https://www.bloomberg.co.jp/news/articles/2021-05-28/QTTYACT1UM1001
https://toyokeizai.net/articles/-/431206?display=b
https://news.yahoo.co.jp/articles/4dbc67f02a93638e846a9e1ac2e4e98ba1af9e5e/comments?expand_form
https://www.jiji.com/jc/article?k=2021052700943&g=pol