Mapcamera (One of the largest store in Japan) shared the top selling cameras of December:

1st place: α7C II
2th place: Z f
3rd place: GR IIIx
4th place: Z 8
5th place: EOS R6 Mark II
6th place: Fuji X-T5
7th place: α7R V
8th place: OM-1
9th place: α7 IV
10th place: α6700

We have four cameras in the top 10.