*1:See also https://sumita-m.hatenadiary.com/entry/2020/02/18/093316 https://sumita-m.hatenadiary.com/entry/2020/03/12/112844 https://sumita-m.hatenadiary.com/entry/2020/08/19/005316 https://sumita-m.hatenadiary.com/entry/2020/08/23/162853 https://sumita-m.hatenadiary.com/entry/2021/07/24/081204 https://sumita-m.hatenadiary.com/entry/2021/09/04/132540 https://sumita-m.hatenadiary.com/entry/2021/09/10/212832 https://sumita-m.hatenadiary.com/entry/2021/09/14/084907 https://sumita-m.hatenadiary.com/entry/2021/09/16/084138 https://sumita-m.hatenadiary.com/entry/2021/09/18/111100 https://sumita-m.hatenadiary.com/entry/2021/09/28/004422