I wasn't aware classifying games by their country of origin is a thing.
Different developers and cultures have different approaches to their products, there's a fairly clear line between the type of approach japanese games (and tv shows, animation, books, food etc.) have to their western counterparts.
Compare guilty gear and tekken, with their crazy characters and goofy plots to mortal Kombat and KI
Compare Final Fantasy to Dragon Age and Witcher
Compare Splatoon to Call of Duty and Halo
Compare Zelda to Horizon (I guess)
Compare Nier to... no equivalent
Compare Resident Evil to... no equivalent
Compare Mario Kart to... no equivalent
Compare Smash Brothers to... no equivalent (we will pretend Playstation All-Stars didn't exist)
Compare Steins Gate to... no equivalent
Compare Persona to...no equivalent
Compare Bayonetta to...no equivalent
Compare Zero escape to...no equivalent
Compare Ace Attorney to...no equivalent
Compare Dancing all Night to... no equivalent
Compare Pokemon to... no equivalent
...
There also happens to be a variety of games in japanese games that aren't prevalent in western games (not to say american games don't have variety, just that japanese games have plenty of types of games that the west havent even touched).
So yeah, it's not that unfair to say that developers from the two different regions create very different games.