2019年７月31日。
京成上野駅*1。
台東区上野４丁目*2。
*1:See also https://sumita-m.hatenadiary.com/entry/20160818/1471486768 https://sumita-m.hatenadiary.com/entry/20181005/1538730662 https://sumita-m.hatenadiary.com/entry/2020/04/16/215020 https://sumita-m.hatenadiary.com/entry/2020/12/27/192147
*2:See also https://sumita-m.hatenadiary.com/entry/2020/01/23/122107 https://sumita-m.hatenadiary.com/entry/2020/06/15/085346 https://sumita-m.hatenadiary.com/entry/2021/01/07/144329 https://sumita-m.hatenadiary.com/entry/2021/02/07/161123 https://sumita-m.hatenadiary.com/entry/2021/03/01/152935 https://sumita-m.hatenadiary.com/entry/2021/08/14/101345
