His performance in Japan vs his performance abroad is likely due to the fact that the Japanese players have experience against Yoshi and Amsa himself. I'm not trying to take away from his accomplishments abroad, but I can't help but think he wouldn't be doing as well if the rest of the world had experience against a Yoshi of his level, and considering he's basically the only one...Amsa isnt even top 5 in japan for melee. So many hidden bosses