Nintendo had a battle against the MariCAR go-kart rental service last year, which Nintendo ended up winning. This forced MariCAR to change their name to MARI Mobility Development. It's clear they weren't happy about how the lawsuit went, and all these months later, they appear to be more bitter than ever.
The Japanese company Chizai Bouei Kabushiki Gaisha have applied for two trademarks in Japan. One is for 任天堂は無関係 (Nintendo is irrelevant) and the other is for 'Unrelated to Nintendo' in English. Chizai Bouei Kabushiki Gaisha has applied for trademarks on the behalf of MARI Mobility Development in the past, and it's clear they have ties once again for these trademarks. Futhermore, both the ‘任天堂は無関係’ and ‘Unrelated to Nintendo’ phrases are now being displayed by MARI Mobility Development on their go-karts.