How come there hasn't been any discussion about invasions of the Japanese home islands? There's been some talk about what if the Yuan were able to make it, but I can't think of anyone else ruling China who ever had the inclination to do so other than for those Mongols.
There's also this:
There's also this:
1426 : The Ming Chinese government demands that King of Japan Yoshimitsu do more to counteract the trader-pirates, who have moved from their traditional raids along the coast of Korea to attacking the huge merchant fleets sailing the North-Eastern route to Mexico. Yoshimitsu replies that he is occupied by growing domestic problems but will try his best. The Chinese Emperor states darkly that if the political situation in Japan doesn't improve he may have to use his army and navy to lend a hand....
1428: Great Peasant revolt in Japan. The Ming Chinese emperor uses it as an excuse to begin raiding of Central Japan. Some of the warrior clans assist the Chinese, but others resist most vehemently. But the Japanese civilisation is damaged already, loss of the merchant-pirates as a profitable force has crippled the economy, and the shogun has been reduced to a vassal. Many begin looking for a way out.
1429-34: Chinese forces continue to expand into Japan, with more and more fiefdoms changing sides and allying with them. In early 1430 a ship arrives in Kamakura, crewed by a mixed Japanese/Aleut accompaniment. They tell of their small colony in the Aleut Islands, and how it is a good raiding point for raids on the Chinese merchant fleets. When word comes that the Chinese have captured Odowara, a great number of the Kamakura population boards any vessel they can find and follow the ship to the Aleut islands, taking with them tools, weapons, supplies and a larger gene pool.