The real thread title should be "PS5 price is too high according to Capcom, so Monster Hunter Wilds sales underperformed in Japan."
Physical sales data from Famitsu
MH Wilds - 816k
MH World - 2.7m (3.2m with digital)
MH Rise - 2.9m (4m with digital)
MH Generation + Ultimate - 4.9m
MH 4 + Ultimate - 6.2m
MH 3 + Ultimate - 3.3m
MHF3 - 5.3m
MHF2 + Unite - 6m
MH 2 - 700k
MH1 - 520k