*1:See also https://sumita-m.hatenadiary.com/entry/2020/05/22/132633 https://sumita-m.hatenadiary.com/entry/2021/05/13/123307
*2:See also https://sumita-m.hatenadiary.com/entry/2019/08/20/073933 https://sumita-m.hatenadiary.com/entry/2020/03/19/023253 https://sumita-m.hatenadiary.com/entry/2020/05/09/103607 https://sumita-m.hatenadiary.com/entry/2020/07/22/153200 https://sumita-m.hatenadiary.com/entry/2020/07/25/215456 https://sumita-m.hatenadiary.com/entry/2020/07/28/234952 https://sumita-m.hatenadiary.com/entry/2020/09/08/101928 https://sumita-m.hatenadiary.com/entry/2020/09/16/122823 https://sumita-m.hatenadiary.com/entry/2020/09/18/022123 https://sumita-m.hatenadiary.com/entry/2020/11/06/143118 https://sumita-m.hatenadiary.com/entry/2020/11/07/090604 https://sumita-m.hatenadiary.com/entry/2020/11/19/131418 https://sumita-m.hatenadiary.com/entry/2020/12/07/091517 https://sumita-m.hatenadiary.com/entry/2020/12/29/113702 https://sumita-m.hatenadiary.com/entry/2021/02/11/021727 https://sumita-m.hatenadiary.com/entry/2021/02/18/110540 https://sumita-m.hatenadiary.com/entry/2021/02/26/184808 https://sumita-m.hatenadiary.com/entry/2021/04/15/090157 https://sumita-m.hatenadiary.com/entry/2021/04/19/215453 https://sumita-m.hatenadiary.com/entry/2021/05/15/021927 https://sumita-m.hatenadiary.com/entry/2021/05/26/091037 https://sumita-m.hatenadiary.com/entry/2021/06/02/081727 https://sumita-m.hatenadiary.com/entry/2021/06/05/092007
