https://twitter.com/mizukisigerudes/status/740872073250144258

http://www.nikkei.com/article/DGKKZO03349980X00C16A6CR8000/

http://headlines.yahoo.co.jp/hl?a=20160609-00000037-mai-soci

http://blog.livedoor.jp/schulze/archives/52157826.html

http://www.nikkan-gendai.com/articles/view/news/183074