Continuing my previous post, albeit a little bit late: 4th place with 905 copies; a weak week again, even if with stronger sales for top 1 (6831), but less than 1000 copies being enough for 3rd place doesn't seem usual to me.
https://www.oricon.co.jp/rank/obp/w/2020-09-14/ (link will live for two weeks at most, I think)
https://www.oricon.co.jp/rank/obp/w/2020-09-14/ (link will live for two weeks at most, I think)