The document discusses sleep, noting that 7.5 hours is statistically the optimal amount of sleep time. It explains that there are two types of sleep: non-REM sleep which rests the brain, and REM sleep which rests the body. Examples are given of Napoleon sleeping only 3 hours a day while Einstein slept 10 hours, and of TV personality Tetuko Kuroyanagi sleeping twice a day. The document recommends finding a comfortable, suitable sleeping time for each individual.

1. Yusuke Baba Takuya Kuribayashi
Hiroki Namekawa Takashi Yoshida

2. Everybody need to sleep sufficiently.
People should sleep appropriate time.
What time is the best sleeping time?

3.  7.5 hours is the best optimal time statistically.

4. 1. why you need to sleep?
2. Do we continusly take how much sleep?

5.  There are two types of sleep for us.
 → non-REM sleep and REM sleep.
 non-REM sleep → has the effect to rest the brain.
REM sleep → has the effect of rest your body.

6. Napoleon Albert Einstein
Short sleeper and long sleeper
He sleeps only 3 hours in a day. He sleeps 10 hours in a day.

7. Tetuko Kuroyanagi
Specific Sleeping type
She sleeps two times in day.

8. •Various types of people
•Difference of sleeping time both of the great people,
and between you and them
•Suitable sleeping time each other

9. •Search comfortable sleeping time
•Try to change sleeping time many times
•Find your suitable sleeping time

10. Reference
Google Search-
(accessed on 9 July,2013;http://blogs.yahoo.co.jp/amamiryujin/15839001.html)
(accessed on 9 July; http://rekishihodan.seesaa.net/article/162280659.html)
(accessed on 9 July; http://yoyodayo.blog134.fc2.com/blog-category-2.html
(accessed on 9 July (http://articles.mercola.com/sites/articles/archive/2008/11/08/how-
much-sleep-do-you-really-need.aspx)