DMM is in full control of the product. Obviously they canned the English version because "hey, not worth the effort". They still have their userbase on the original Japanese version.

TImes like this I really wish Nutaku devs were able to take control of the English version back in the day before DMM devs decided "naw we got this". We wouldn't be as caught up and still have a few breaks, but you know what? We just might still have an English version of the game.