We investigate how rikishi perceive the sumo ring, a circle 4.55 meters across. Along the way we highlight the work that goes into constructing it and how rikishi grip the clay with their toes.

You're squatting in the dohyo sumo ring staring down a younger opponent, who is seconds from hurtling his body resembling a mountain into yours. You're 50 years old, by the way. Welcome to the ...

However, siblings and relatives of active and past competitors entering the dohyo ... sumo wrestlers unless they have confidence that they can perform at least to a certain level in the ring ...

In Grand – Sumo, women are not even allowed to step inside the dohyo, or holy ring. Twenty-year-old Rio Hasegawa lives and practices Sumo in Tokyo. One day she wants to become World Champion.