１月31日。
習志野市立大久保図書館*1。習志野市本大久保３丁目。
習志野市中央公園*2。
*1:See also https://sumita-m.hatenadiary.com/entry/2019/12/02/001041 https://sumita-m.hatenadiary.com/entry/2020/01/16/024951 https://sumita-m.hatenadiary.com/entry/2020/02/13/210049 https://sumita-m.hatenadiary.com/entry/2020/03/02/005806
*2:See also https://sumita-m.hatenadiary.com/entry/2019/07/30/081016 https://sumita-m.hatenadiary.com/entry/2019/12/02/001041 https://sumita-m.hatenadiary.com/entry/2020/01/04/235902 https://sumita-m.hatenadiary.com/entry/2020/01/22/082357 https://sumita-m.hatenadiary.com/entry/2020/02/01/082715 https://sumita-m.hatenadiary.com/entry/2020/02/13/210049 https://sumita-m.hatenadiary.com/entry/2020/02/14/221555 https://sumita-m.hatenadiary.com/entry/2020/03/07/101748
