Japanese restaurant chain operator Monteroza has filed a copyright claim against Nintendo. The restaurant claims that Wii U’s WaraWara Hiroba, known as WaraWara Plaza in the west, is far too similar to its Wara-wara chain of Japanese bars. Monteroza filed a claim on March 22nd with the Patent Office to have Nintendo’s trademark registration revoked. Nintendo says that it was unaware of the izakaya chain and registered the trademark without issue from the Patent Office.