You're forgetting that the opening week in "Others" never works like it does in a single big market as US or Japan. The "Others" market spans a ton of seperate countries, and games don't release there with a single big bang.
My guess is that it takes longer until all countries receive their shippings, until all sales numbers are collected, ... then there's different holidays, different languages, different marketing campaigns... there's a reason why "Others" always get the short end of the stick with fewer and delayed games: Because it's the most cluttered market.
The positive thing is that games tend to sell well for a longer period, instead of being frontloaded like in US and Japan. Just pick a few games and compare their first 2-3 weeks between US and Others.








