https://irorio.jp/sophokles/20181130/507522/

https://headlines.yahoo.co.jp/hl?a=20181130-00000194-kyodonews-soci https://www.nikkei.com/article/DGXMZO38317800Z21C18A1000000/

https://gentosha-go.com/articles/-/18981

http://www.tokyo-np.co.jp/article/living/life/201811/CK2018112902000192.html

https://twitter.com/amida28/status/1069014468074467328