I went to an Urawa Red Diamonds game in April last year wearing a Leicester shirt with Abe on the back and I got noticed by a fair few people, shaking my hand and just being very smiley and pleasant in general, my mate on the other hand was wearing a forest shirt and turned no heads whatsoever. This was pre Premier League, I can imagine our exposure over there has only increased, especially now.
Can't wait to go back in a few years time, if you ever get the chance to go to Japan, GO, it's an incredible place!