*1:See also https://sumita-m.hatenadiary.com/entry/2020/09/05/170400 https://sumita-m.hatenadiary.com/entry/2021/12/17/124254 https://sumita-m.hatenadiary.com/entry/2022/02/10/020029 https://sumita-m.hatenadiary.com/entry/2022/02/22/163651 https://sumita-m.hatenadiary.com/entry/2022/03/04/090904 https://sumita-m.hatenadiary.com/entry/2022/04/21/110622
