We challenged a 600 pound sumo to tug of war, canon ball, arm wrestling, stretching, and gymnastics flips. Yama is the largest Japanese person in recorded history. ? NEW NINJA MERCH ? http://www.ninjakidz.store ? Request a personalized video: https://www.cameo.com/ninja_kidz_tv ? Join the Ninja Club and become a Ninja! https://www.ninja-kidz.com/ FollowContinue Reading