2021年12月28日。
千葉駅*1。
*1:See also https://sumita-m.hatenadiary.com/entry/20160824/1472005939 https://sumita-m.hatenadiary.com/entry/20160825/1472131811 https://sumita-m.hatenadiary.com/entry/20160907/1473235398 https://sumita-m.hatenadiary.com/entry/2020/04/10/152534 https://sumita-m.hatenadiary.com/entry/2020/07/14/224419 https://sumita-m.hatenadiary.com/entry/2020/08/17/100706 https://sumita-m.hatenadiary.com/entry/2021/01/16/023635 https://sumita-m.hatenadiary.com/entry/2021/05/09/142337
