http://news.goo.ne.jp/article/tokyo/region/tokyo-CK2015122102000160.html

http://news.biglobe.ne.jp/domestic/1224/mai_151224_1326979263.html

http://headlines.yahoo.co.jp/hl?a=20151224-00050043-yom-soci

http://mainichi.jp/articles/20151224/ddm/001/040/132000c

http://mainichi.jp/articles/20151224/org/00m/040/003000c