Earlier quoted context omitted.
Yet, Japan had no issue building a wide range of popular console video games but had far less success in PC games. Language seems like a better explanation as US and Japan had quite different UI constraints in their native language.
Japanese game devs didn't put nearly as much effort into PC games as they did into console games, outside of some early exceptions like the MSX and the Sharp X68000. The main issue was that there really wasn't a domestic market for PC games in Japan, and Japanese game devs focused on serving the domestic market first. So you had half-assed efforts like a single outsourced developer "porting" Mega Man 1 and 3 to DOS (…
*(often free or packed into "1001 games for free with this magazine" disks)