*1:See also http://d.hatena.ne.jp/sumita-m/20051222/1135275271 http://d.hatena.ne.jp/sumita-m/20070329/1175189030 http://d.hatena.ne.jp/sumita-m/20120115/1326643979 http://d.hatena.ne.jp/sumita-m/20140723/1406083089 http://d.hatena.ne.jp/sumita-m/20140820/1408501641 http://d.hatena.ne.jp/sumita-m/20150719/1437328367 http://d.hatena.ne.jp/sumita-m/20160209/1455034797 http://d.hatena.ne.jp/sumita-m/20160801/1470065891 https://sumita-m.hatenadiary.com/entry/20170406/1491491309 https://sumita-m.hatenadiary.com/entry/2019/08/15/204221 https://sumita-m.hatenadiary.com/entry/2019/09/11/102504 https://sumita-m.hatenadiary.com/entry/2020/02/12/020430 https://sumita-m.hatenadiary.com/entry/2020/02/29/091917 https://sumita-m.hatenadiary.com/entry/2020/03/09/141737 https://sumita-m.hatenadiary.com/entry/2020/03/11/233303
