*1:See also https://sumita-m.hatenadiary.com/entry/2020/02/02/100650 https://sumita-m.hatenadiary.com/entry/2020/03/05/033241 https://sumita-m.hatenadiary.com/entry/2020/03/20/082810 https://sumita-m.hatenadiary.com/entry/2020/05/11/141631 https://sumita-m.hatenadiary.com/entry/2020/05/15/142141 https://sumita-m.hatenadiary.com/entry/2020/06/10/074951 https://sumita-m.hatenadiary.com/entry/2020/06/26/012426 https://sumita-m.hatenadiary.com/entry/2020/07/06/094945 https://sumita-m.hatenadiary.com/entry/2020/07/19/160936 https://sumita-m.hatenadiary.com/entry/2020/07/23/090916 https://sumita-m.hatenadiary.com/entry/2020/07/29/131926 https://sumita-m.hatenadiary.com/entry/2020/08/03/143153 https://sumita-m.hatenadiary.com/entry/2020/08/12/210232 https://sumita-m.hatenadiary.com/entry/2020/08/18/110459 https://sumita-m.hatenadiary.com/entry/2020/08/20/011402 https://sumita-m.hatenadiary.com/entry/2020/08/21/094739 https://sumita-m.hatenadiary.com/entry/2020/09/16/020729 https://sumita-m.hatenadiary.com/entry/2020/10/14/011409 https://sumita-m.hatenadiary.com/entry/2020/11/02/105527 https://sumita-m.hatenadiary.com/entry/2020/12/30/110126 https://sumita-m.hatenadiary.com/entry/2021/01/01/124012