*1:See also https://sumita-m.hatenadiary.com/entry/2020/05/09/204136 https://sumita-m.hatenadiary.com/entry/2020/05/27/141546 https://sumita-m.hatenadiary.com/entry/2021/01/03/082204 https://sumita-m.hatenadiary.com/entry/2021/04/29/145947 https://sumita-m.hatenadiary.com/entry/2021/08/18/091448 https://sumita-m.hatenadiary.com/entry/2022/03/31/005347
