>>717591992
Too Japanese for wide appeal.
No, seriously. Think of the monster franchises that caught on, like Pokemon and Digimon. Sure, they do have some pretty specific stuff, but generally they have things kids from anywhere could find cool.
Meanwhile Yokai Watch is... well, stuff like this.
I'm not saying that Japanese stuff can't be popular in West. But it's just way too hyperspecific to one region.

>>717592587
...They should be more so!