Kyuta Kumagai, 10, practises sumo with his coach Shinichi Taira, a former professional sumo wrestler, at Komatsuryu Sumo Club in Tokyo, Japan, August 23, 2020. "At 85 kilograms (187 lb), Kyuta is twice the size of the other children his age and is so dominant that he wrestles, and beats, boys five or six years older. REUTERS/Kim Kyung-Hoon

Kyuta Kumagai, 10, trains at Komatsuryu Sumo Club in Tokyo, Japan, August 30, 2020. He trains six days a week, either at his local sumo club or lifting weights. He also swims and practices track and field to build up the flexibility and explosive quickness needed for sumo wrestling. REUTERS/Kim Kyung-Hoon

Kyuta Kumagai, 10, practices sumo with his coach Shinichi Taira, a former professional sumo wrestler, at Komatsuryu sumo club in Tokyo, Japan, August 30, 2020. Kyuta has been on the programme since his father entered him in a tournament while still in kindergarten. REUTERS/Kim Kyung-Hoon

Kyuta Kumagai, 10, lifts dumbbells during a one-on-one training session which his father organized at the Buddhist temple Joshin-ji in Tokyo, Japan, September 2, 2020. REUTERS/Kim Kyung-Hoon

Kyuta Kumagai, 10, does a plank during a one-on-one training session which his father organized at the Buddhist temple Joshin-ji in Tokyo, Japan, September 2, 2020. REUTERS/Kim Kyung-Hoon

Kyuta Kumagai, 10, practices sumo with his father Taisuke, 50, during a one-on-one training session which his father organized at the Buddhist temple Joshin-ji in Tokyo, Japan, September 2, 2020. "I think he is managing to make time for himself and I think he has time to play with his friends," explained Taisuke. "I don't think it is too much pressure." REUTERS/Kim Kyung-Hoon