*1:https://tsukemen-tsujita.com/ https://twitter.com/tsujita1137
*2:See also https://sumita-m.hatenadiary.com/entry/2020/08/05/101027 https://sumita-m.hatenadiary.com/entry/2020/11/13/090659 https://sumita-m.hatenadiary.com/entry/2021/03/03/010412 https://sumita-m.hatenadiary.com/entry/2021/10/28/082219
