*1:See also https://sumita-m.hatenadiary.com/entry/2020/01/04/162334 https://sumita-m.hatenadiary.com/entry/2020/02/07/005509 https://sumita-m.hatenadiary.com/entry/2020/02/09/125441 https://sumita-m.hatenadiary.com/entry/2020/02/11/082110 https://sumita-m.hatenadiary.com/entry/2020/02/26/094909 https://sumita-m.hatenadiary.com/entry/2020/03/02/082617 https://sumita-m.hatenadiary.com/entry/2020/03/26/025642 https://sumita-m.hatenadiary.com/entry/2020/05/17/101413 https://sumita-m.hatenadiary.com/entry/2020/10/20/213309 https://sumita-m.hatenadiary.com/entry/2020/12/03/165131 https://sumita-m.hatenadiary.com/entry/2020/12/06/160821 https://sumita-m.hatenadiary.com/entry/2021/01/23/022507 https://sumita-m.hatenadiary.com/entry/2021/03/02/084238 https://sumita-m.hatenadiary.com/entry/2021/03/04/143227
