https://kanpou.npb.go.jp/20150701/20150701h06565/20150701h065650010f.html

http://mainichi.jp/shimen/news/20150704ddm012040028000c.html

http://www.at-s.com/news/detail/1174210465.html

http://news.goo.ne.jp/article/toyokeizai/bizskills/toyokeizai-75217.html

http://news.goo.ne.jp/article/mainichi_region/region/mainichi_region-20150704ddlk22040201000c.html