He wants his own spotlight. He goes to the Dodgers he's Shohei's Ohtani's Japanese teammate. He goes to San Diego or Toronto he is the guy in those markets the Japanese media focuses on. I am thinking he signs with the Padres for a variety of reasons including the time zone, the weather, and the overall fit.
It will be interesting to see what intrigues him so much about the Blue Jays. I guess the idea of him being a star on the only team in Canada has it's own allure to certain personalities.