*1:See also https://sumita-m.hatenadiary.com/entry/2020/07/24/081421 https://sumita-m.hatenadiary.com/entry/2021/03/17/084707 https://sumita-m.hatenadiary.com/entry/2021/12/23/170921 https://sumita-m.hatenadiary.com/entry/2022/12/20/222738 https://sumita-m.hatenadiary.com/entry/2022/12/29/023620 https://sumita-m.hatenadiary.com/entry/2023/01/05/095749
