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http://bylines.news.yahoo.co.jp/itokazuko/20150113-00042192/

http://www.chunichi.co.jp/article/front/list/CK2015011302000060.html

http://news.goo.ne.jp/article/mainichi/nation/mainichi-20150115k0000m040060000c.html

http://kanpou.npb.go.jp/20150114/20150114g00007/20150114g000070008f.html

http://www.chunichi.co.jp/article/column/editorial/CK2015011402000112.html?ref=rank