The Impact of Postponing 2020 Tokyo Olympics on the Happiness of O-MO-TE-NA-SHI Workers in Tourism: A Consequence of COVID-19

: The 2020 Tokyo Olympics have been postponed due to the novel coronavirus (COVID-19) pandemic. The implications for industries related to the Olympics—tourism, hotels and restaurants, and others—are expected to be a ﬀ ected by reduced demand. Japanese workers in these industries were prepared to o ﬀ er their hospitality to visitors from around the world. They would be beneﬁted not only by an increase in income but also in o ﬀ ering visitors a taste of Tokyo’s great hospitality if the Olympics had been held in 2020. However, postponement of the sporting event is likely to have a signiﬁcant impact on their happiness level. We independently collected individual-level panel data from March to April 2020. In the survey, the respondents were asked about their happiness levels by choosing from 11 categories: 1 (very unhappy) and 11 (very happy). They were also asked about expected income changes from 2020 to 2021. Based on this, we examined the e ﬀ ect of postponement on happiness level and expected income change. The sample was divided into sub-samples of areas including and excluding Tokyo. We found that the happiness level of workers in the tourism and restaurant sectors declined drastically after the announcement of the postponement. Only two weeks later, their happiness level did not alter from the pre-announcement level. This tendency was strongly observed in Tokyo and the surrounding prefectures, but not in other prefectures. However, workers engaged in the tourism and restaurant sectors did not predict a decrease in their income even after the postponement. Combined, these ﬁndings indicate that loss of extending hospitality, rather than reduction in income, temporarily reduces the happiness level of workers.


Introduction
In the Session of the International Olympic Committee in Buenos Aires on 8 September 2013, French-Japanese TV announcer Christel Takigawa drew significant attention to her speech by using impressive words with a dazzling smile and graceful gestures. She spelled out O-MO-TE-NA-SHI as the core attribute of Japan's legendary hospitality. In this study, workers in the tourism and restaurant sectors are referred to as OMOTENASHI workers. OMOTENASHI is believed to have contributed to the selection of Tokyo as the host for the 2020 Olympic Games. The 2020 Tokyo Summer Olympics have been postponed due to the COVID-19 pandemic. The decision was made only four months before the Olympics were scheduled to start on 24 July 2020. The Olympic Games have never been canceled for any public health reasons in their history (Vaishya [1]). There is a possibility that the Tokyo Summer Olympics will be canceled if the COVID-19 pandemic persists in 2021. This caused a no researchers have considered this aspect. (Postponement of the Olympics is expected to influence the mental condition of athletes who qualified to participate in the Olympics (Schinke [23])) Hence, this work examines the impact of the postponement of the 2020 Tokyo Summer Olympics on workers in the tourism and restaurant sectors in Tokyo and the surrounding areas. With respect to the analysis of COVID-19, Fetzer et al. [24] gathered data from 58 countries through internet surveys that were conducted between late March and early April 2020. They investigated how the COVID-19 pandemic influenced respondents' perceptions and mental conditions. However, they could not compare them before and after the COVID-19 pandemic because they did not construct panel data. Layard et al. [25] compared the costs and benefits of the lockdown to mitigate the spread of COVID-19 in the United Kingdom (UK). They considered not only traditional economic indices such as income and unemployment but also mental health. However, no study examined the impact of COVID-19 and the postponement of the Olympics on the well-being of workers in the host city where the event was scheduled to be held.
As a natural experiment during the COVID-19 pandemic, we independently conducted three surveys from March to April 2020 to construct individual-level panel data. The second wave was conducted directly after the announcement of the Tokyo Summer Olympic postponement. Using the data, we found that the happiness level of tourism workers and restaurants in Tokyo and surrounding areas had declined directly after the announcement of the postponement of the Games. However, their happiness level returned during the third wave to the level in the first wave. The contribution of this study is to show the negative impact of postponement on the happiness of OMOTENASHI workers, which disappeared two weeks later.
The remainder of this article is organized as follows. Section 2 presents an overview of the influence of COVID-19 in Japan. The data and methods are described in Section 3. Section 4 presents the estimated results and the interpretation. Section 5 provide a discussion. The final section provides some reflections and conclusions.

Overview of the Influence of COVID-19
In Figure 1, the three-quadrant curve indicates the changes in the total number of people infected with COVID-19 during the period between 10 March and 10 April 2020. Just prior to March 2020, the Japanese government requested that schools start closing in March, although it was legally unenforceable. Accordingly, various schools-primary, junior high, and high schools-were closed from 2 March, even though the number of people infected with COVID-19 was only about 250, and the pace of its increase was very slow. The 2020 Tokyo Olympics were to be held in July 2020. This schedule suffered harsh criticism from Japan and other countries. Eventually, on 24 March, it was announced by the Japanese government that the Olympics was postponed by one year.
After the announcement that the Olympics was postponed, there was a surge in the number of people infected with COVID-19. This caused the government to declare a state of emergency on 7 April. This was not legally enforceable, which was different from the "lockdown" announced in other countries such as Italy, the U.K., France, and the United States (US). However, similar to other countries (Baldwin and Mauro [26]), the request was substantially effective in closing art museums and amusement parks and cancelling various professional sports events such as baseball and football games. To reduce the spread of COVID-19, people were requested to maintain social distance and stay at home. Therefore, people avoided person-to-person contact and crowded gatherings in closed indoor spaces. After the announcement that the Olympics was postponed, there was a surge in the number of people infected with COVID-19. This caused the government to declare a state of emergency on 7 April. This was not legally enforceable, which was different from the "lockdown" announced in other countries such as Italy, the U.K., France, and the United States (US). However, similar to other countries (Baldwin and Mauro [26]), the request was substantially effective in closing art museums and amusement parks and cancelling various professional sports events such as baseball and football games. To reduce the spread of COVID-19, people were requested to maintain social distance and stay at home. Therefore, people avoided person-to-person contact and crowded gatherings in closed indoor spaces.

Survey Design
Before the spread of the COVID-19 pandemic in Japan, we anticipated that the infectious disease would diffuse throughout Japan. COVID-19 was considered an exogenous shock. Therefore, the setting was thought to be a natural experiment. Therefore, internet surveys were planned to pursue identical individuals to explore how COVID-19 influences their happiness and expectations about income in the following year. INTAGE, a research company, had ample experience in academic research and was reliable for conducting the surveys. Hence, we commissioned INTAGE to conduct the surveys. The sampling method was designed to collect a representative sample of the Japanese population considering residential areas, age, educational background, gender and job status. Our survey selected a Japanese population aged 16-79 years across the entire country. Every two weeks, we conducted surveys in March and April. Figure 1 demonstrates the timing of the surveys. We conducted the first wave between 13-16 March and collected 4359 observations. The response rate was 54.7%. On 24 March, even though the total number of infected people increased modestly, it was announced that the 2020 Tokyo Olympics were postponed. Directly after the announcement, the second wave was conducted between 27-30 March. In response to the rapid spread of the COVID-19 pandemic in Japan, the Japanese government declared a state of emergency on 7 April, which led the Japanese people to significantly change their daily life routine (Yamamura and Tsutsui [27]). The third wave was conducted between 10-13 April. The response rates were 54.7% (first wave), 80.2%

Survey Design
Before the spread of the COVID-19 pandemic in Japan, we anticipated that the infectious disease would diffuse throughout Japan. COVID-19 was considered an exogenous shock. Therefore, the setting was thought to be a natural experiment. Therefore, internet surveys were planned to pursue identical individuals to explore how COVID-19 influences their happiness and expectations about income in the following year. INTAGE, a research company, had ample experience in academic research and was reliable for conducting the surveys. Hence, we commissioned INTAGE to conduct the surveys. The sampling method was designed to collect a representative sample of the Japanese population considering residential areas, age, educational background, gender and job status. Our survey selected a Japanese population aged 16-79 years across the entire country. Every two weeks, we conducted surveys in March and April. Figure 1 demonstrates the timing of the surveys. We conducted the first wave between 13-16 March and collected 4359 observations. The response rate was 54.7%. On 24 March, even though the total number of infected people increased modestly, it was announced that the 2020 Tokyo Olympics were postponed. Directly after the announcement, the second wave was conducted between 27-30 March. In response to the rapid spread of the COVID-19 pandemic in Japan, the Japanese government declared a state of emergency on 7 April, which led the Japanese people to significantly change their daily life routine (Yamamura and Tsutsui [27]). The third wave was conducted between 10-13 April. The response rates were 54.7% (first wave), 80.2% (second wave) and 92.2% (third wave). Panel data that combined waves 1-3 were used in regression estimations. Therefore, the sample size used in estimations became larger than the sample in the first wave. Hence, even though we use unbalanced panel data, most of the individuals included in the first wave also appeared in the second and third waves. The number of identical respondents is reported as "groups" in Tables 1-6.

Data
This study examines how the postponement of the Olympics influenced the happiness level of residents in Japan, especially "OMOTENASHI" workers engaged in the tourism and restaurant sectors. Furthermore, the impact of the postponement of the Olympics is believed to differ according to the respondents' expected probability of holding the Olympics in the summer of 2020. The gap between expectations and the real situation was wider as the expected probability increased. As derived from prospect theory (Kahneman and Tversky [28]), respondents with higher expectations would become unhappier. In the first wave of the survey, we asked respondents about the probability of holding the Olympics as previously scheduled. Figure 2 illustrates the distribution. Clearly, responses were concentrated at 50%. Therefore, respondents with a neutral view were the largest group. The distribution was not skewed. That is, the number of respondents with an expected probability higher than 50% is almost equivalent to those with a probability lower than 50%.
first wave also appeared in the second and third waves. The number of identical respondents is reported as "groups" in Tables 1-6.

Data
This study examines how the postponement of the Olympics influenced the happiness level of residents in Japan, especially "OMOTENASHI" workers engaged in the tourism and restaurant sectors. Furthermore, the impact of the postponement of the Olympics is believed to differ according to the respondents' expected probability of holding the Olympics in the summer of 2020. The gap between expectations and the real situation was wider as the expected probability increased. As derived from prospect theory (Kahneman and Tversky [28]), respondents with higher expectations would become unhappier. In the first wave of the survey, we asked respondents about the probability of holding the Olympics as previously scheduled. Figure 2 illustrates the distribution. Clearly, responses were concentrated at 50%. Therefore, respondents with a neutral view were the largest group. The distribution was not skewed. That is, the number of respondents with an expected probability higher than 50% is almost equivalent to those with a probability lower than 50%. Based on this information, we divided the sample into high and low expected probability of holding the Olympics as scheduled. In this paper, the high expected group is defined to include respondents with an expected probability being equal to or greater than 60%. The low expected group is defined to include respondents with an expected probability being equal to or below 40%. We will use the sub-sample of the high and low expected groups when regression estimations were conducted.
In waves 1-3, the respondents were asked about their happiness levels by choosing from 11 categories: 1 (very unhappy) and 11 (very happy). Figure 3 illustrates the distribution of the happiness level using a sample consisting of waves 1-3. The distribution was skewed toward the right. Even during the COVID-19 pandemic, respondents who experienced happiness higher than 5 were remarkably larger than those who felt happiness lower than 5. Based on this information, we divided the sample into high and low expected probability of holding the Olympics as scheduled. In this paper, the high expected group is defined to include respondents with an expected probability being equal to or greater than 60%. The low expected group is defined to include respondents with an expected probability being equal to or below 40%. We will use the sub-sample of the high and low expected groups when regression estimations were conducted.
In waves 1-3, the respondents were asked about their happiness levels by choosing from 11 categories: 1 (very unhappy) and 11 (very happy). Figure 3 illustrates the distribution of the happiness level using a sample consisting of waves 1-3. The distribution was skewed toward the right. Even during the COVID-19 pandemic, respondents who experienced happiness higher than 5 were remarkably larger than those who felt happiness lower than 5.
(1) Wave 1 (2) Wave 2    It is clearly observed that the happiness level decreased from wave 1 to wave 3. This is considered to reflect the spread of COVID-19. COVID-19 is thought to influence happiness through various channels: (1) recession caused by COVID-19, (2) increased probability of death by infection, and (3) deteriorated mental health and depression due to an unexperienced and unintended lifestyle. In Figure 6, the mean value of the expected change in household income is illustrated in each wave. In all the waves, the value is below 0, indicating that, on average, the respondents expect their household income to decrease from 2020 to 2021. However, there was no difference between wave 1 and wave 2. This shows that economic activities did not suffer significant damage, even though the 2020 Tokyo Olympics was postponed. From wave 2 to wave 3, expected change in income declined, showing the significant difference between the two waves, implying that the state of emergency has a direct and significant impact on economic activities.       In Figure 6, the mean value of the expected change in household income is illustrated in each wave. In all the waves, the value is below 0, indicating that, on average, the respondents expect their household income to decrease from 2020 to 2021. However, there was no difference between wave 1 and wave 2. This shows that economic activities did not suffer significant damage, even though the 2020 Tokyo Olympics was postponed. From wave 2 to wave 3, expected change in income declined, showing the significant difference between the two waves, implying that the state of emergency has a direct and significant impact on economic activities. In Figure 6, the mean value of the expected change in household income is illustrated in each wave. In all the waves, the value is below 0, indicating that, on average, the respondents expect their household income to decrease from 2020 to 2021. However, there was no difference between wave 1 and wave 2. This shows that economic activities did not suffer significant damage, even though the 2020 Tokyo Olympics was postponed. From wave 2 to wave 3, expected change in income declined, showing the significant difference between the two waves, implying that the state of emergency has a direct and significant impact on economic activities.

Method
We used the regression method to ascertain the determinants of happiness level. The estimated function takes the following form, and the fixed effects model was used for the estimation: Happiness it (or expected income change) it = α0 + α1 Wave2 dummy t × Tourism i + α2 Wave3 dummy t × Tourism i + α3 Wave2 dummy t + α4 Wave3 dummy t + α5 Infected persons it + k i + u it, where Happiness it represents the dependent variable in individual i and period t. With these specifications, we examine the impact of the postponement of the Olympics on happiness level. The coefficient of each variable is represented by "α." Expected income change it is the dependent variable when we examine the impact of the postponement of the Olympics on expected income change. Time-invariant individual-specific fixed effects are represented by k i, which capture unmeasured variables including age, educational background, income level, and gender. The regression parameters are denoted as α. The error term is denoted as u.
The Wave 2 dummy and Wave 3 dummy are included to capture the impact of the spread of the COVID-19 pandemic because economic and social conditions drastically changed during the study period, as illustrated in Figure 1. Wave 2 takes the value of 1 if observations are collected directly after announcement of postponement of the Olympics, otherwise 0. Wave 3 takes the value of 1 if observations are collected directly after announcement of postponement of the Olympics, otherwise 0. More specifically, the Wave 2 dummy captured the effect of the postponement of the Olympics, while Wave 3 dummy captured the effect of the state of emergency. The reference group was the first wave (wave 1). The coefficient of Wave 2 dummy shows how the happiness level in wave 2 is different from that in wave 1. Similarly, the coefficient of Wave 3 dummy shows how the happiness level in wave 3 is different from that in wave 1. Also, respondents who encountered the huge risk of being infected by COVID-19 were predicted to be unhappy. In order to control for that, the total number of infected persons in prefectures where individuals i resided in wave t, (Infected persons it,), was included.
Tourism was a dummy variable that had 1 if respondents worked in either the tourism or restaurant sectors, and otherwise 0. In order to consider the difference in the impact of the postponement of the Olympics between O-MO-TE-NA-SHI workers and other ones because tourism and restaurants are thought to greatly depend on the demand from visitors from other countries during the Olympic Games, the cross terms between wave dummies and Tourism (Wave dummy t × Tourism) were included. Workers in the tourism and restaurant sectors suffered greater

Method
We used the regression method to ascertain the determinants of happiness level. The estimated function takes the following form, and the fixed effects model was used for the estimation: Happiness it (or expected income change) it = α 0 + α 1 Wave2 dummy t × Tourism i + α 2 Wave3 dummy t × Tourism i + α 3 Wave2 dummy t + α 4 Wave3 dummy t + α 5 Infected where Happiness it represents the dependent variable in individual i and period t. With these specifications, we examine the impact of the postponement of the Olympics on happiness level. The coefficient of each variable is represented by "α". Expected income change it is the dependent variable when we examine the impact of the postponement of the Olympics on expected income change. Time-invariant individual-specific fixed effects are represented by k i , which capture unmeasured variables including age, educational background, income level, and gender. The regression parameters are denoted as α. The error term is denoted as u.
The Wave 2 dummy and Wave 3 dummy are included to capture the impact of the spread of the COVID-19 pandemic because economic and social conditions drastically changed during the study period, as illustrated in Figure 1. Wave 2 takes the value of 1 if observations are collected directly after announcement of postponement of the Olympics, otherwise 0. Wave 3 takes the value of 1 if observations are collected directly after announcement of postponement of the Olympics, otherwise 0. More specifically, the Wave 2 dummy captured the effect of the postponement of the Olympics, while Wave 3 dummy captured the effect of the state of emergency. The reference group was the first wave (wave 1). The coefficient of Wave 2 dummy shows how the happiness level in wave 2 is different from that in wave 1. Similarly, the coefficient of Wave 3 dummy shows how the happiness level in wave 3 is different from that in wave 1. Also, respondents who encountered the huge risk of being infected by COVID-19 were predicted to be unhappy. In order to control for that, the total number of infected persons in prefectures where individuals i resided in wave t, (Infected persons it, ), was included.
Tourism was a dummy variable that had 1 if respondents worked in either the tourism or restaurant sectors, and otherwise 0. In order to consider the difference in the impact of the postponement of the Olympics between O-MO-TE-NA-SHI workers and other ones because tourism and restaurants are thought to greatly depend on the demand from visitors from other countries during the Olympic Games, the cross terms between wave dummies and Tourism (Wave dummy t × Tourism) were included. Workers in the tourism and restaurant sectors suffered greater damage due to the postponement than others. Naturally, the coefficient of Wave 2 dummy × Tourism was expected to have a negative sign when happiness was a dependent variable. In order to investigate whether the impact of the postponement was caused by income loss, we checked Wave 2 dummy × Tourism when expected income change was a dependent variable. The postponement had an impact on happiness through the channel of loss of income if the sign of Wave 2 dummy × Tourism is a negative sign.

Results
In Tables 1-6, we report the estimates obtained from the fixed effects estimation. Tables 1-3 report results when happiness level is the dependent variable. Tables 4-6 report the results when expected income change is the dependent variable. Tables 1 and 4 indicate the results using a sub-sample throughout Japan. The impact of postponement of the Olympics is thought to be larger in Tokyo and its surrounding areas than other areas because tourists are more likely to stay in these areas during the Olympics. Therefore, we divided the sample into sub-samples including and excluding Tokyo. Tables 2 and 5 indicate the results using a sub-sample covering Tokyo and its surrounding three prefectures (Kanagawa, Chiba, and Saitama prefectures). Tables 3 and 6 indicate the results using a sub-sample excluding Tokyo and its surrounding three prefectures. Each table reports results based on a sub-sample according to the extent to which respondents subjectively expected the probability of holding the Olympics as scheduled. The group with a high expected probability was equal to or greater than 80% and 60% in columns (1) and (2), respectively. The probabilities were equal to or below 40% and 20% in columns (3) and (4), respectively. Note: Numbers within parentheses are robust standard errors, clustered by individuals. For convenience of interpretation, the coefficient of infected persons was multiplied by 1000. *** p < 0.01, ** p < 0.05, * and p < 0.1.
We begin by discussing Table 1. Signs of Wave 2 dummy and Wave 3 dummy were negative and statistically significant at the 1% level in all the columns. In addition, the absolute values of the coefficient of Wave 3 dummy were larger than those of Wave 2 dummy in all the columns. This indicates that the happiness levels declined as COVID-19 spread, which is consistent with Figure 4. This tendency was observed regardless of the individual's expectation of holding the Olympics in 2020. Turning to the key variable, the coefficients for Wave 2 dummy × Tourism showed a negative sign and were statistically significant in columns (1) and (2). Meanwhile, it showed a positive sign despite being statistically insignificant in columns (3) and (4). OMOTENASHI workers with high expectations were more disappointed by the postponement than other people. However, this tendency was not observed for those with low expectations. Wave 3 dummy × Tourism did not show statistical significance. In our interpretation, the impact of postponement on OMOTENASHI workers did not persist for only two weeks.  We see from Table 2 that Wave 2 dummy × Tourism yielded a negative sign and was statistically significant at the 1% level in columns (1) and (2). The absolute values of the coefficients were 1.94 and 1.58 in columns (1) and (2), respectively, approximately two times larger than those in Table 1. We interpret this as implying that the happiness levels of OMOTENASHI workers were 1.95 points lower on the 11 point scale than others when the sample was limited to residents in Tokyo and surrounding prefectures with an expectation of 80% or more that the Olympics would be held in 2020. In the case of respondents with expectation of 60% or more, the happiness levels of OMOTENASHI workers were 1.58 points lower on the 11 point scale. Meanwhile, the statistical significance of Wave 2 dummy × Tourism disappeared in columns (3) and (4). From this, we argue that the negative impact of the postponement of the 2020 Olympics became smaller as the expected probability declined. Similar to the results of Table 1, Wave 3 dummy × Tourism was not statistically significant in any column. That is, the announcement of the postponement of the Olympics had a sizable negative impact on the happiness level of OMOTENASHI workers in Tokyo and surrounding areas if they had a high expectation of the 2020 Olympics being held. However, the gap in the happiness level between OMOTENASHI workers and others disappeared after two weeks, suggesting that the negative impact was temporary. (Impact of various variables on the happiness level did not persist in the long term (Tsutsui & Ohtake [29]), Kinari et al. [30]]).
In Table 3, neither Wave 2 dummy × Tourism indicated statistical significance in any columns. The postponement of Olympic Games did not cause a difference in the happiness level of workers in tourism and other sectors. In our interpretation, apart from Tokyo and surrounding areas, workers in the tourism and restaurant sectors did not expect the Tokyo Olympics to increase demand for their services and their revenue. Therefore, they did not consider the Tokyo Olympics in relation to their business even though they worked in the tourism and restaurant sectors. Now, we shift attention to the estimation results for the expected income change from 2020 to 2021. In Table 4, except for Wave 2 dummy in column (4), Wave 2 dummy and Wave 3 dummy showed negative signs. Wave 3 dummy is statistically significant at the 1% level in all columns, which is consistent with Figure 5. We interpret from this that people changed their expectations about income not because of the postponement of the Olympics but due to the state of emergency. They believed that the postponement of Olympics hardly had an impact on income generation. People considered that the if the impact of the state of emergency persists, it could reduce income growth from 2020 to 2021. Wave 2 dummy × Tourism and Wave 3 dummy × Tourism did not present statistical significance in any of the columns. Similar to Table 4, these cross terms did not show statistical significance in most of the results.   Considering Tables 1-6 jointly leads us to argue that the postponement of the 2020 Tokyo Olympics reduced the happiness level of OMOTENASHI workers in Tokyo and surrounding areas, even though the postponement did not change expectations about their income. (We obtained results similar to those in Tables 2 and 5 by dividing the sample of Tokyo and surrounding prefectures into two separate samples: Tokyo and prefectures. The results are available upon request from the corresponding author.) That is, OMOTENASHI workers felt unhappy not due to loss of their expected income, but due to other psychological reasons.

Discussion
In comparison with expectations prior to the COVID-19 spread, the number of tourists and visitors to Tokyo and surrounding areas will decline drastically, which could lead to a reduction in revenue for the tourism and restaurant sectors in Tokyo and surrounding areas. According to prospect theory, people consider lower outcomes as losses and greater ones as gains (Kahneman and Tversky [28]). However, they became directly unhappy only after the announcement of the postponement. Economic damage following the postponement due to loss of expected revenue in 2020 did not change within a few weeks. According to our estimated results, OMOTENASHI workers did not consider the impact serious, at least during March-April, 2020. Overall, OMOTENASHI workers were disappointed because they could not contribute to the Olympics through O-MO-TE-NA-SHI hospitality.
Apart from revenues and economic benefits, OMOTENASHI workers feel happy to provide their hospitality to tourists during the 2020 Tokyo Olympics. In this regard, the values of the Olympics should be reconsidered. It is widely acknowledged that the modern Olympics has been commercialized to stimulate host countries to pursue economic benefits. However, the gigantic shock of the COVID-19 pandemic is postponement of the 2020 Tokyo Olympics, as the Games were expected to generate large economic benefits. Moreover, the motivation to host the Olympics would be reduced among countries if unexpected and unintended shocks such as the COVID-19 pandemic are considered. As prospect theory states, people are likely to give more importance to losses than to pursue gains (Kahneman and Tversky [28]). In the future, it seems plausible that no city will be a candidate to host the Olympics. Inevitably, a critical problem arises: are the modern Olympics sustainable? A possible approach to sustain the Olympics is to make it more compact and less commercialized. That is, it is time to return to the philosophy of the Olympics and give more importance to sporting amateurism in the new world after the COVID-19 pandemic.
Postponement of mega sporting events such as the Olympics is expected to fundamentally change the way the sports industry operates in the future. We must examine the impact of these changes from a socio-cultural, economic and political perspective (Parnell et al. [31]). Dolan et al. [22] provided evidence of an aggregate willingness-to-pay (WTP) for hosting the Olympics below the actual costs of hosting the games, although the Olympics increase the subjective well-being of residents in the hosting cities. Human history shows that devastating pandemics play a critical role in the revival of human society. The bubonic plague (Black Death) was the deadliest pandemic that ravaged Europe and led to the economic recession in the Middle Ages. The Black Death was the reason the Middle Ages came to an end. The Black Death caused social evolution, giving rise to the Renaissance. In the 21st century, detaching from the philosophy of the Olympic Games, the modern Olympics has been immoderately commercialized and politicized. We regard the COVID-19 shock as a catalyst that will lead the Olympic Games to return to its original philosophy. If so, the Olympics would be sustainable despite the COVID-19 pandemic.

Conclusions
The COVID-19 pandemic had an unprecedented impact on various sporting events. Above all, postponement of the 2020 Tokyo Olympics was unexpected. The Olympic Games are mega-events, which are expected to promote economic growth and increase the presence of countries in the globalized world. In 2020, the number of tourists and visitors to Japan was expected to increase, especially Tokyo and the surrounding prefectures. Workers engaged in the OMOTENASHI industry lost the expected increase in income and the opportunities to extend hospitality to tourists enjoying the Olympics. Naturally, these workers were expected to be disappointed.
We conducted three internet-surveys in 13 March (before the announcement of postponement), 27 March (after the announcement postponement) and 10 April (after the state of emergency was declared). In these surveys, we pursued identical individuals to investigate how the postponement of the 2020 Tokyo Olympics influenced the happiness level of workers in the OMOTENASHI industries. The major findings were: OMOTENASHI workers' happiness levels declined abnormally after the announcement of the postponement decision. Two weeks later, under the state of emergency, their happiness returned to the level before the announcement of postponement. Meanwhile, OMOTENASHI workers did not predict a decrease in their income immediately after the postponement. From these findings, we argue that postponement of the 2020 Tokyo Olympics lowered the happiness level because of the loss of hospitality rather than loss of income. However, most of the workers recovered from the loss of the Tokyo Olympics within two weeks, although the economic recession worsened.
Author Contributions: E.Y. made substantial contribution to conception, analysis, interpretation of data, and writing of the article. Y.T. is the project leader responsible for the surveys and obtained the research fund. He also revised the first draft of the paper. All authors have read and agreed to the published version of the manuscript. This research was funded by [Japan Society for the Promotion of Science] grant number [18KK0048].
Funding: This research was funded by Japan Society for the Promotion of Science: 18KK0048.