2021年11月20日。
クリスマス・ツリー*1。千葉工業大学*2。習志野市津田沼２丁目。
*1:See also https://sumita-m.hatenadiary.com/entry/20141202/1417527277 https://sumita-m.hatenadiary.com/entry/20150512/1431433918 https://sumita-m.hatenadiary.com/entry/20161220/1482199431 https://sumita-m.hatenadiary.com/entry/2020/12/28/080130 https://sumita-m.hatenadiary.com/entry/2022/12/01/075342 https://sumita-m.hatenadiary.com/entry/2022/12/20/134134
*2:See also https://sumita-m.hatenadiary.com/entry/20140820/1408501641 https://sumita-m.hatenadiary.com/entry/2020/08/25/104513 https://sumita-m.hatenadiary.com/entry/2021/10/09/123758 https://sumita-m.hatenadiary.com/entry/2021/11/20/155014 https://sumita-m.hatenadiary.com/entry/2021/12/02/105228 https://sumita-m.hatenadiary.com/entry/2023/01/22/093345
