http://www.chusho.meti.go.jp/zaimu/shoukei/2016/161205shoukei.htm

http://www3.nhk.or.jp/news/html/20161208/k10010800031000.html

http://www.sankei.com/affairs/news/161207/afr1612070001-n1.html

http://www.mext.go.jp/b_menu/shingi/chukyo/chukyo4/012/siryo/1380106.htm

http://jp.reuters.com/article/thailand-tokyo-idJPKBN13V0IQ