It depends on how much they care. If the chinese people running the restaurant are just half-assing japanese food and using japanese culture for the name and clout, its disrespectful. Effectively just trying to profit off the culture. Whereas if those chinese people are trying their best to understand and replicate the culture, it’s fine.

Hot take: a japanese person can “appropriate” their own culture. If they just take advantage of their name and ethnicity, without actually learning about the culture. This is just really rare in practice because people of any ethnicity are usually forced to learn about their own culture when growing up