*1:See also https://sumita-m.hatenadiary.com/entry/20060328/1143512113 https://sumita-m.hatenadiary.com/entry/20060329/1143638198 https://sumita-m.hatenadiary.com/entry/20070817/1187373427 https://sumita-m.hatenadiary.com/entry/20080826/1219723717 https://sumita-m.hatenadiary.com/entry/20091007/1254929417 https://sumita-m.hatenadiary.com/entry/20100713/1278993463 https://sumita-m.hatenadiary.com/entry/20160130/1454171340 https://sumita-m.hatenadiary.com/entry/20160211/1455116539 https://sumita-m.hatenadiary.com/entry/20161014/1476463918 https://sumita-m.hatenadiary.com/entry/2019/04/13/095811 https://sumita-m.hatenadiary.com/entry/2019/06/23/012820 https://sumita-m.hatenadiary.com/entry/2020/01/17/142016 https://sumita-m.hatenadiary.com/entry/2021/01/12/020545 https://sumita-m.hatenadiary.com/entry/2021/02/11/161925 https://sumita-m.hatenadiary.com/entry/2021/03/18/150834 https://sumita-m.hatenadiary.com/entry/2021/03/30/070308 https://sumita-m.hatenadiary.com/entry/2021/04/07/091749 https://sumita-m.hatenadiary.com/entry/2022/03/19/215014 https://sumita-m.hatenadiary.com/entry/2022/06/20/024635 https://sumita-m.hatenadiary.com/entry/2022/10/10/005622
