*1:See also https://sumita-m.hatenadiary.com/entry/2020/09/18/024035 https://sumita-m.hatenadiary.com/entry/2020/10/13/010902 https://sumita-m.hatenadiary.com/entry/2021/02/03/090226 https://sumita-m.hatenadiary.com/entry/2021/08/07/235248 https://sumita-m.hatenadiary.com/entry/2022/03/17/110049 https://sumita-m.hatenadiary.com/entry/2022/03/28/133531