*1:See also https://sumita-m.hatenadiary.com/entry/2020/07/19/165757 https://sumita-m.hatenadiary.com/entry/2021/01/12/091129 https://sumita-m.hatenadiary.com/entry/2021/04/08/151840 https://sumita-m.hatenadiary.com/entry/2021/06/01/000800 https://sumita-m.hatenadiary.com/entry/2021/10/02/092229 https://sumita-m.hatenadiary.com/entry/2021/10/24/105004 https://sumita-m.hatenadiary.com/entry/2021/11/03/223247 https://sumita-m.hatenadiary.com/entry/2022/03/15/230454