doom 2 does honestly not run well. it is a pretty laughably bad bootleg, and while all of the features of doom 2 are there, the fact that the game lags FAR behind when buttons are hit make the game completely unplayable.
Why not do a South Korean release instead. Japan is extremely xenophobic when it comes to video games. I bet Capcom had to tell the public that GTA is Scottish (or British for Stories games) and not American for it to sell. The South Koreans are much more open to American made games than the Japanese.