2020年３月23日。
習志野市鷺沼１丁目*1。
津田沼５丁目*2。
*1:See also https://sumita-m.hatenadiary.com/entry/20161015/1476517356 https://sumita-m.hatenadiary.com/entry/2021/03/12/080535 https://sumita-m.hatenadiary.com/entry/2021/03/24/225140
*2:See also https://sumita-m.hatenadiary.com/entry/20161015/1476517356 https://sumita-m.hatenadiary.com/entry/2020/05/04/084756 https://sumita-m.hatenadiary.com/entry/2020/07/08/212010 https://sumita-m.hatenadiary.com/entry/2020/09/04/144825 https://sumita-m.hatenadiary.com/entry/2020/09/23/085017 https://sumita-m.hatenadiary.com/entry/2021/02/01/013649 https://sumita-m.hatenadiary.com/entry/2021/02/19/232522 https://sumita-m.hatenadiary.com/entry/2021/03/19/210932