Report on the results of the 2023 edition of Japan’s “Sleep Deviation Index®” surveySleep Quality found to be the Key for Improving Productivity and Immunity, not Sleeping Hours

Brain Sleep, Inc. has been conducting the Sleep Deviation Value® survey of 10,000 people in 47 prefectures across Japan since 2020. 2023 marked the fourth year of the survey. We will use the results of this survey to conduct various activities to further improve sleep situation in Japan.

For more information please see PDF.