No xenophobia is “the fear or dislike of people who are perceived as being foreign or strange”. Thats just from the dictionary.

You could call the brutal repression of the Ainu and native Okinawans a kind of xenophobic/racist ultra nationalism. Also Japan’s crimes extend far beyond China, and were especially brutal in Korea were they practiced a horrific form of slavery.

The Japanese are so xenophobic they try to exclude the descendants of Korean slaves who have been living in Japan for a century, have Japanese names, and only speak Japanese. Their xenophobia is not laudable.