Sleeping time (hours) of Japanese people
According to the government statistics, the average sleep length is 462 minutes (7 hours and 42 minutes). The following table shows the average sleep length of Japanese people by age.
| Age | Minutes | Hours |
| 10～14 | 515 | 8.6 |
| 15～19 | 462 | 7.7 |
| 20～24 | 476 | 7.9 |
| 25～29 | 463 | 7.7 |
| 30～34 | 457 | 7.6 |
| 35～39 | 443 | 7.4 |
| 40～44 | 432 | 7.2 |
| 45～49 | 423 | 7.1 |
| 50～54 | 426 | 7.1 |
| 55～59 | 434 | 7.2 |
| 60～64 | 451 | 7.5 |
| 65～69 | 468 | 7.8 |
| 70～74 | 481 | 8.0 |
| 75～79 | 502 | 8.4 |
| 80～84 | 528 | 8.8 |
| Over 85 | 580 | 9.7 |
The table below presents sleep length of people who are working (having a job or housekeeping), and sleep length of people who are not working.
| Age | Hours of "working people" | Hours of "not working people" |
| 15～19 | 7.8 | 7.7 |
| 20～24 | 7.9 | 8.1 |
| 25～29 | 7.6 | 8.2 |
| 30～34 | 7.6 | 7.8 |
| 35～39 | 7.3 | 7.6 |
| 40～44 | 7.2 | 7.3 |
| 45～49 | 7.0 | 7.2 |
| 50～54 | 7.1 | 7.2 |
| 55～59 | 7.2 | 7.3 |
| 60～64 | 7.5 | 7.6 |
| 65～69 | 7.7 | 7.9 |
| 70～74 | 7.9 | 8.1 |
| 75～79 | 8.3 | 8.4 |
| 80～84 | 8.7 | 8.8 |
| Over 85 | 8.8 | 9.7 |
It seems that sleep length does not depend on job, but depends on age.
Source is Statistics Bureau, Ministry of Internal Affairs and Communications.
www.e-stat.go.jp/SG1/estat/List.do?bid=000001040666&cycode=0
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