http://booklog.kinokuniya.co.jp/ohtake/archives/2008/11/post_21.html

http://gigazine.net/index.php?/news/comments/20081114_colour_sand_beach/

http://www8.cao.go.jp/jisatsutaisaku/whitepaper/index-w.html

http://www.yomiuri.co.jp/national/news/20081114-OYT1T00006.htm

http://www.zakzak.co.jp/top/200811/t2008111336_all.html

http://www.afpbb.com/article/life-culture/life/2537820/3515273

http://gigazine.net/index.php?/news/comments/20081113_greeting_kids/

http://www.iwate-np.co.jp/newspack/cgi-bin/newspack_s.cgi?s_economics_l+CN2008111301000720_2

http://headlines.yahoo.co.jp/hl?a=20081113-00000122-jij-soci

http://www.kyoto-np.co.jp/article.php?mid=P2008111300136&genre=C4&area=Z10 http://www.moj.go.jp/PRESS/081113-1/20soukatu.html http://d.hatena.ne.jp/FJneo1994/20081113/1226585473