Why Are Nintendo Games Suddenly 'Off Limits' to Japan's Biggest Charity Speedrunning Event?

RTA in Japan, a well-established charity speedrunning contest, has removed Nintendo games from its upcoming Summer 2025 event, despite showcasing them for the past nine years. This is because they suddenly received a warning from Nintendo about using games without permission. The non-profit hopes to feature Nintendo titles again in future events, likely having to lodge individual applications on a per-game, per-event basis. But why has Nintendo suddenly done this now?