*1:See also https://sumita-m.hatenadiary.com/entry/2021/11/27/023100 https://sumita-m.hatenadiary.com/entry/2022/03/11/095424 https://sumita-m.hatenadiary.com/entry/2022/03/17/130901 https://sumita-m.hatenadiary.com/entry/2022/03/26/135117 https://sumita-m.hatenadiary.com/entry/2022/03/31/003958 https://sumita-m.hatenadiary.com/entry/2022/04/17/005203 https://sumita-m.hatenadiary.com/entry/2022/04/29/010938