*1:See also https://sumita-m.hatenadiary.com/entry/2019/12/20/154750 https://sumita-m.hatenadiary.com/entry/2020/07/05/070958 https://sumita-m.hatenadiary.com/entry/2020/07/19/165757 https://sumita-m.hatenadiary.com/entry/2020/07/31/020619 https://sumita-m.hatenadiary.com/entry/2020/11/30/153308 https://sumita-m.hatenadiary.com/entry/2021/01/21/014122 https://sumita-m.hatenadiary.com/entry/2021/03/25/080748 https://sumita-m.hatenadiary.com/entry/2021/04/16/083852 https://sumita-m.hatenadiary.com/entry/2021/05/13/123307 https://sumita-m.hatenadiary.com/entry/2021/05/20/085743 https://sumita-m.hatenadiary.com/entry/2021/05/21/104651 https://sumita-m.hatenadiary.com/entry/2021/05/28/025255 https://sumita-m.hatenadiary.com/entry/2021/06/04/022706 https://sumita-m.hatenadiary.com/entry/2021/06/12/085218 https://sumita-m.hatenadiary.com/entry/2021/06/19/094341 https://sumita-m.hatenadiary.com/entry/2021/06/25/002414 https://sumita-m.hatenadiary.com/entry/2021/09/25/094624 https://sumita-m.hatenadiary.com/entry/2021/09/30/091521 https://sumita-m.hatenadiary.com/entry/2021/10/04/014953
