BrainSleep Co., Ltd. (Headquarters: Chiyoda-ku, Tokyo; Representative Director: Atsushi Hirota; hereinafter "BrainSleep") has been conducting a "Sleep Score®" survey since 2020, targeting 10,000 individuals (allocated by individual, age, and prefecture) across all 47 prefectures of Japan. The Sleep Score is a comprehensive scoring method that not only directly assesses conditions such as sleep habits and sleep disorders, but also the degree of productivity and stress, and the risk of sleep apnea syndrome (SAS). Moving forward, we will utilize the results of this survey to carry out various activities aimed at improving sleep in Japan. Sleep Score® Survey Results Pagehttps://brain-sleep.com/pages/research2025 Survey Results Summary BrainSleep has constructed "Sleep Score®" from various sleep metrics and has been working to understand the actual sleep situation of Japanese people and to develop health management services for corporate employers. This time, we measured the 2025 version of the Sleep Score and newly identified the characteristics of Japanese people's sleep in the following five categories: 1. Changes in Japanese sleep duration 2. Sleep state misperception 3. Gap between ideal and reality of priority actions after regular working hours 4. Relationship between commuting time and sleep 5. Awareness of sleep apnea syndrome (SAS) 1. Changes in Japanese sleep duration: No change compared to 2024. People in their 20s and 30s average over 7 hours of sleep. Sleep duration has been on the rise since the COVID-19 pandemic, but the sleep duration for 10,000 working individuals in 2025 was 6 hours and 50 minutes, which is equivalent to 2024, the longest recorded average over the past 5 years. Furthermore, when examined by age group, it was found that the average sleep duration for people in their 20s and 30s exceeded 7 hours. While younger generations in their 20s and 30s showed an increasing trend over five years, those in their 40s and 50s showed only a slight increase, and those aged 60 and above showed a decrease. *One-way ANOVA was performed on all data, confirming significant differences (p<0.01). Furthermore, a t-test with Bonferroni correction was performed for comparisons of sleep duration with the previous year, confirming significant differences from 2020 to 2024 (all p<0.01). 2. Sleep state misperception: Many feel their perceived sleep duration is 23 minutes shorter than their actual sleep duration. Sleep state misperception refers to a state where there is a discrepancy between "actual sleep duration" and "perceived sleep duration (what one feels)." This survey found that approximately 52% of respondents felt their perceived sleep duration was shorter than their actual sleep duration. The average actual sleep duration was 6 hours and 50 minutes, while the average perceived sleep duration was 6 hours and 27 minutes, resulting in a difference of 23 minutes. *A test was conducted between actual sleep duration and perceived sleep duration, confirming a difference in perception (p<0.01). 3. Gap between ideal and reality of priority actions after regular working hours: While "sleep" is ideally prioritized, "work (including overtime and commuting time)" is actually prioritized. The most common "ideal" priority action after work was "sleep" at 36.4%. However, "work (including drinking parties)" was "actually" prioritized by 25.2% of respondents, indicating that despite it being "after work," the most common choice was work. Compared to the ideal, the actual prioritized actions were "sleep" and "hobbies," with "sleep" showing the largest difference. *A chi-square test was performed between the ideal and reality for the proportion of respondents who answered that they want to prioritize a particular action, confirming a difference in perception for all actions (p<0.01) 4. Relationship between commuting time and sleep: Long commuting times affect not only sleep duration but also sleep quality. The longest "sleep duration" was for the group with a commuting time of "less than 30 minutes" at 6 hours and 58 minutes. The shortest was for the group with "3 hours or more" at 6 hours and 24 minutes, a difference of 34 minutes. The highest "sleep quality" was for those with "0 minutes" commuting time (no commuting at all) at 57.3 points, and for those with "3 hours or more," it was 51.4 points, showing a difference of approximately 6 points. While it is easy to imagine that commuting time shortens sleep duration, this survey revealed that it not only shortens sleep duration but also affects sleep quality. *Commuting time: Time spent commuting in one day *Sleep quality score: Scoring of responses to original questions *Regression analysis was performed between commuting time and sleep duration, and between commuting time and sleep quality score, confirming a perceived relationship in each case (p<0.01). 5. Awareness of Sleep Apnea Syndrome (SAS): Awareness is approximately 77% Approximately 77% of respondents had heard of the disease SAS, indicating that many people are aware of it. Furthermore, when those who had heard of SAS were asked how much they knew about it, it was found that while the connection to "snoring" and "being overweight" is well-known, information about SAS in "women" and "children," as well as the fact that examinations and treatments are covered by insurance, may not be as widely known. Comment from Dr. Seiji Nishino, Chief Research Advisor at BrainSleep and author of "The Stanford Way to a Restful Sleep" This year's Sleep Score survey also yielded several noteworthy results. While there was no clear increase in sleep duration, approximately half of the people felt that they were not getting enough sleep compared to their actual sleep duration, clearly indicating a tendency for "sleep state misperception." Furthermore, it was a very significant result that approximately 80% of people recognized and understood sleep apnea syndrome. It also became clear that the relationship between commuting time and sleep duration, which has been discussed for a long time, not only shortens sleep duration but also leads to concerns about sleep quality. Sleep problems are often difficult for individuals to solve alone, and I hope that social initiatives by companies and governments to solve sleep problems will be further promoted. Sleep Score® Survey Results Page https://brain-sleep.com/pages/research2025 BrainSleep can provide various information regarding this survey. ※When using the content of this survey, please be sure to cite "Sleep Score® 2025 BrainSleep Survey" as the source. What is Sleep Score®? When evaluating sleep, attention is often focused solely on simple quantitative data such as sleep duration. However, BrainSleep believes it is crucial to evaluate sleep from a more multi-faceted and comprehensive perspective. We created a set of questions that quantify subjective sleep evaluation from various viewpoints, and by further numerically expressing it as a "deviation score" (hensachi), which is familiar to Japanese people, we have established a system that enables the understanding of one's relative sleep status within the overall Japanese population. Currently, with NTT East as an innovation partner, we are developing "Sleep Score for Biz," a health management service for companies. This service aims to firmly establish "engagement" with companies through employee "sleep," and by comparing with the nationwide Sleep Score, companies can newly identify issues that have not been apparent on their own, thereby improving presenteeism. 【Survey Outline】 Survey Method: Web Survey Region: Nationwide Target Population: Men and women Sample Size: n=10,000ss Survey Period: January 2025 ※For comparisons of Sleep Scores and other scores between groups, one-way ANOVA or t-tests were conducted, and statistically significant differences were determined as p-values below 5%.
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