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 X6

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 (they weren't anything like the real MM 1 and 3). PC ports of most popular console games weren't common until the Xbox 360/PS3 era.