１月13日。
東京都港区南青山５丁目*1。
*1:See also https://sumita-m.hatenadiary.com/entry/20170420/1492710355 https://sumita-m.hatenadiary.com/entry/20170505/1494007562 https://sumita-m.hatenadiary.com/entry/2020/01/30/093526 https://sumita-m.hatenadiary.com/entry/2020/02/03/014842 https://sumita-m.hatenadiary.com/entry/2020/02/09/015839