http://book.asahi.com/reviews/reviewer/2017102900008.html

https://headlines.yahoo.co.jp/hl?a=20171028-00000024-flix-movi&p=1

https://ameblo.jp/jijijili/entry-12325185561.html

http://www.pref.nagano.lg.jp/kyoiku/kyoiku02/happyou/291102.html https://www.pref.hiroshima.lg.jp/uploaded/attachment/217942.pdf

http://webronza.asahi.com/national/articles/2017102700006.html