I agree with Kojima. Japanese games these days feels like they're not innovating at all. It's usually the same art direction, same gameplay with the same story designs. Even on a technical standpoint, it seems that Japanese devs do not take advantage of tools as well as western devs.
Either way. Kojima isn't the first one that said said this. Inafune, Wada and itagaki has said the same. Everyone is trying to migrate their target audience to the west. Right now, the western devs are beating japanese devs to the curb.