Yusuke 　 Baba　　 Takuya 　 KuribayashiHiroki　Namekawa　　　Takashi　Yoshida

Everybody　need　to　sleep　sufficiently.

People　should　sleep　appropriate　time.

　　　What　time　is　the　best　sleeping　time?

7.5　hours　is　the　best　optimal　time　statistically.

1. why you need to sleep?

2. Do　we　continusly take how much sleep?

　 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.

Napoleon Albert　Einstein

Short sleeper and long sleeper

He sleeps only 3 hours in a day. He sleeps 10 hours in a day.

Tetuko Kuroyanagi

Specific Sleeping type

She sleeps two times in day.

•Various　types　of　people

•Difference　of　sleeping　time　both　of　the　great　people,　and　between　you　and　them

•Suitable　sleeping　time　each　other

•Search　comfortable　sleeping　time

•Try　to　change　sleeping　time　many　times

•Find　your　suitable　sleeping　time

ReferenceGoogle　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)