*1:See also https://sumita-m.hatenadiary.com/entry/20060803/1154628184 https://sumita-m.hatenadiary.com/entry/20081011/1223696156 https://sumita-m.hatenadiary.com/entry/20141127/1417023558 https://sumita-m.hatenadiary.com/entry/2020/02/01/083510 https://sumita-m.hatenadiary.com/entry/2020/07/08/004704 https://sumita-m.hatenadiary.com/entry/2020/07/12/014545 https://sumita-m.hatenadiary.com/entry/2020/07/20/090531 https://sumita-m.hatenadiary.com/entry/2020/07/23/083225 https://sumita-m.hatenadiary.com/entry/2020/08/03/103144 https://sumita-m.hatenadiary.com/entry/2020/08/05/003020 https://sumita-m.hatenadiary.com/entry/2020/08/08/235537 https://sumita-m.hatenadiary.com/entry/2020/08/12/210232 https://sumita-m.hatenadiary.com/entry/2020/08/14/085340 https://sumita-m.hatenadiary.com/entry/2020/08/16/012938 https://sumita-m.hatenadiary.com/entry/2020/08/19/162538 https://sumita-m.hatenadiary.com/entry/2020/09/24/151609 https://sumita-m.hatenadiary.com/entry/2021/06/19/103426
