DST (Daylight Saving Time, commonly known as Summer Time) is a time system in which the clocks are set forward by one or two hours from the standard time for each country or region in the summer. DST in Europe and the United States was established about 100 years ago in order to request for cooperation in the World War. As the health problems have become apparent in modern society, both Europe and the United States are moving toward abolishing DST, but as of 2024, it has been continued. Japan has not adopted DST except for a few years after the World War II, but unless DST is abolished in Europe and the United States, it is predicted that there will be a movement to introduce DST in Japan again in the future. However, considering Japan's latitude, hot and humid weather, electricity demand, modern short-sleep sleeping habits, and diversification of lifestyles, the introduction of DST in Japan is not possible to bring any “benefits” such as heat countermeasures, electricity and energy conservation, or creating leisure time, but rather is predicted to have adverse effects such as increased working hours, health problems including sleep, and confusion in database management. Therefore, in modern Japan, it can be concluded that DST is an unnecessary, harmful and useless “fraudulent” time system, and that its introduction should be firmly opposed.
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