Was browsing through a sizeable cube-book* I found on World History, and I noticed that the name of Will Adams came up a few times as an English visitor to Japan, and later as the foreign adviser to the Shogun. It also mentioned a few deals between him, the Shogun, and King James I to establish an English trading post in Japan. Obviously that didn't work out too well in OTL...
...but what if it had?
(I freely admit that the book may not be altogether accurate, given that it featured Cabot sailing around North America in 1510 - thirteen years after he disappeared, never to return. Unless I'm much mistaken, we didn't employ zombies back then.)
*a book with the rough proportions of a cube.