I wrote a comment to the similar question before: https://www.reddit.com/r/AskHistorians/comments/ah4183/when_did_asia_learned_about_the_discovery_of/

It was extremely unlikely that any Eastern Asians like Japanese (including Ainu people) and Chinese that had known the 'New World' before Columbus, much less shown any interest in it.

As for the latter's interest in the wider world, it is also useful to check some of the relevant posts in this subreddit or in its own wiki section on the credibility of Gavin Menzies' notoriously problematic work.