Sumo is a form of competitive full-contact wrestling where a rikishi (wrestler) attempts to force his opponent out of a circular ring (dohyō) or into touching the ground with any body part other than the soles of his feet.

Emperor Suinin , also known as Ikumeiribikoisachi no Sumeramikoto (活目入彦五十狭茅天皇) was the 11th legendary Emperor of Japan, according to the traditional order of succession. Less is known about Suinin than his father, and likewise he is also considered to be a "legendary emperor". Both the Kojiki, and the Nihon Shoki record events that took place during Suinin's alleged lifetime. This legendary narrative tells how he ordered his daughter Yamatohime-no-mikoto to establish a new permanent shrine for Amaterasu, which eventually became known as the Ise Grand Shrine. Other events that were recorded concurrently with his reign include the origins of Sumo wrestling in the form of a wrestling match involving Nomi no Sukune.