Corpos may try it for export, but I do not expect them to adopt western values for domestic market.
Most of JP multibillion yen corpo are already fallen. Sony is the king of DEI and catering heavily to mental illness, Nintendo is very close second. Those two are actively celebrate the mental illness month every year. Pokemon Company is full of DEI people (their recent mega-leak is also confirming this). Squeenix have "ethic" department, known client of SBI and already actively censoring their game themselves, no matter whether it is JP or EN version of the game.
Same with Capcom, Bandai Namco (except Tekken/Soul Calibur series to some extent) and Konami (newest is Silent Hill 2). All of them have been infiltrated by DEI propaganda. Squeenix and Bamco even bragging about their DEI support in their games.
Other smaller JP publisher play it safe when releasing their game to the west, some are tricked into using DEI infested localizer which butchered the translation of their games.
There is no hope with the corpo because they value money (and opportunity to make money, mostly in the western market) above all else.
The only hope for Japan is on the smaller publisher, independent artist, and, ironically, H-games publisher, to resist the DEI infestation in Japan. Also us (JP and rest of the world) as a customer. Boycotting DEI infested games is the only way to stop the DEI spread. Buy only from publisher who don't censor their games, knowingly recruit DEI people on their teams, or celebrating mental illness month. Sony already had taste of the boycott with the laughable concord flop, and Ubisoft with multiple DEI-infested failure of games, which made them in talks on acquisition/going private.