Nearly 40 percent of Japanese adults aged 20 and older sleep less than six hours a day on average, according to government survey results announced on Nov. 14.
The 2015 health and diet survey conducted by the Ministry of Health, Labor and Welfare showed that 39.5 percent of adults sleep less than six hours, the highest percentage seen in that group since the first survey in 2003. The most common answer for average daily sleep time was six to seven hours, at 34.1 percent, followed by five to six hours at 31.1 percent, seven to eight hours at 18.5 percent, less than five hours at 8.4 percent, eight to nine hours at 5.9 percent and nine hours or longer at 2.1 percent. The percentage of those who sleep less than five hours was also a record high.
The ratio of adults who sleep less than six hours has been on the rise since 2007. Among women in their 50s, 52.8 percent say they get less than six hours of sleep on average.
Nearly half of the people who said they sleep less than six hours claimed they feel drowsy during the day at least three times a week. In addition, more people in the less-than-six-hours group feel they are not getting enough sleep or not satisfied with the quality of their sleep than those who sleep at least six hours on average.
Asked what people needed to secure enough sleep time, the most common thing men in their 20s to 50s pointed out was "shorter working hours," while women in their 30s said "support raising children," and women in their 40s named "help with household chores." The most common answer among all respondents in 20s was "staying away from mobile phones or video games before going to bed."