https://www.youtube.com/watch?v=sxtUHnzTHrI&t=1753s 少子化を考える https://www.youtube.com/channel/UCyqjAxCzZ5mP5fU9ysEQZ7w みやちゃんねる! - YouTube https://www.youtube.com/channel/UCcsfXIJWp_17hKwlcMDLumw
http://www.nicovideo.jp/watch/sm42978560
