2021年8月10日。
世田谷区成城6丁目*1。
*1:See also https://sumita-m.hatenadiary.com/entry/2020/02/09/094400 https://sumita-m.hatenadiary.com/entry/2021/04/20/090751 https://sumita-m.hatenadiary.com/entry/2022/01/30/080000 https://sumita-m.hatenadiary.com/entry/2022/02/16/202049 https://sumita-m.hatenadiary.com/entry/2022/06/15/062334 https://sumita-m.hatenadiary.com/entry/2022/09/16/104633 https://sumita-m.hatenadiary.com/entry/2023/04/21/153615