Hi! Cubs fan here. I happen to drop by a store named Selection Shinjuku in Tokyo. They sell American sports goods but mostly MLB. They have a space all dedicated to Shohei.
All-American Baseball & Softball Store | Los Angeles CA
American Card Shop now open - Sports Trading Cards - Clovis, California | Facebook Marketplace | Facebook
Baseball: The Great American Game: 29-Book Set – The Creative Company Shop
Amazon.com: Greater Half Jersey: Liberty Edition Grey America #1 Jersey (2XL) : Sports & Outdoors