By the way, the same can be said for most Koreans. In fact Koreans don't like Japan so much that there are widespread false beliefs about Japan---say, the social acceptance of the Adult Video industry (which still doesn't exist) or the fabricated reporting of COVID-19 cases (which might or might not have been happened, but if it did happen, was not that excessive as the rumor suggested) or even that there is zero stigma about game centers (there is, but not to the extent you have initially suggested). There are also many true beliefs that I can independently verify from multiple sources, including those about the modern Yakuza. But you seem to believe that the Japanese society is so conglomerated that it can make any such source up to cover its innards and you can only trust insider's accounts (and I do have plenty from my friends in Japan). How am I supposed to rationally continue this discussion given that?
Stop trolling. You should have any source to say "this company is operated by yakuza".
You simply need to understand that in Japan, that the insight you made: "Yes, Konami is well known for its shitty business and toxic inside culture but that can always happen without Yakuza ties" is simply wrong.
Companies who behave like this in Japan are not normal companies. They always have ties to organised crime, full stop. No normal company would risk being seen as a black kigyō, because like I tried to explain above, the divisions between those companies and reputable companies in Japan are extremely strong and there is no gray area.
From your name, I reckon you are culturally inclined to perpetuate false myths out of some East Asian pride reflex?