*1:See also https://sumita-m.hatenadiary.com/entry/2020/07/28/113108 https://sumita-m.hatenadiary.com/entry/2020/08/29/141551 https://sumita-m.hatenadiary.com/entry/2021/02/04/165339 https://sumita-m.hatenadiary.com/entry/2021/08/12/021002 https://sumita-m.hatenadiary.com/entry/2022/02/15/092642 https://sumita-m.hatenadiary.com/entry/2023/04/06/173912
