*1:See also https://sumita-m.hatenadiary.com/entry/2020/06/11/100221 https://sumita-m.hatenadiary.com/entry/2020/06/24/111037 https://sumita-m.hatenadiary.com/entry/2022/01/13/084741 https://sumita-m.hatenadiary.com/entry/2022/05/07/145037 https://sumita-m.hatenadiary.com/entry/2023/04/01/103712 https://sumita-m.hatenadiary.com/entry/2023/04/07/105857
