2019年８月12日。
上野公園*1。
*1:See also https://sumita-m.hatenadiary.com/entry/20081117/1226913089 https://sumita-m.hatenadiary.com/entry/20100628/1277750059 https://sumita-m.hatenadiary.com/entry/20150722/1437535845 https://sumita-m.hatenadiary.com/entry/20160818/1471486768 https://sumita-m.hatenadiary.com/entry/2019/04/06/102306 https://sumita-m.hatenadiary.com/entry/2020/01/14/115748 https://sumita-m.hatenadiary.com/entry/2020/02/23/134205 https://sumita-m.hatenadiary.com/entry/2020/03/11/140158 https://sumita-m.hatenadiary.com/entry/2020/03/16/110419 https://sumita-m.hatenadiary.com/entry/2020/05/11/153851 https://sumita-m.hatenadiary.com/entry/2020/06/28/164710 https://sumita-m.hatenadiary.com/entry/2020/07/03/105520 https://sumita-m.hatenadiary.com/entry/2020/07/19/231713 https://sumita-m.hatenadiary.com/entry/2020/09/04/135646 https://sumita-m.hatenadiary.com/entry/2020/09/23/092212 https://sumita-m.hatenadiary.com/entry/2020/10/07/133250 https://sumita-m.hatenadiary.com/entry/2021/01/07/144329 https://sumita-m.hatenadiary.com/entry/2021/04/07/161416 https://sumita-m.hatenadiary.com/entry/2021/06/04/025533 https://sumita-m.hatenadiary.com/entry/2021/07/18/105910 https://sumita-m.hatenadiary.com/entry/2021/08/12/013147 https://sumita-m.hatenadiary.com/entry/2021/09/24/144826
