*1:See also https://sumita-m.hatenadiary.com/entry/2020/02/28/020826 https://sumita-m.hatenadiary.com/entry/2020/08/29/135133 https://sumita-m.hatenadiary.com/entry/2021/05/12/083853 https://sumita-m.hatenadiary.com/entry/2021/07/04/080505 https://sumita-m.hatenadiary.com/entry/2023/02/15/153055 https://sumita-m.hatenadiary.com/entry/2025/09/01/164559
