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The Tokyo Grand Sumo Association becomes the All Japan Sumo Association at the instigation of Prince-Regent Hirohito, laying the foundations for the world's sole professional sumo association.

Japan Sumo Association

Professional sumo wrestling regulatory agency in Japan

The Japan Sumo Association , officially the Public Interest Incorporated Foundation Japan Sumo Association ; sometimes abbreviated JSA or NSK, and more usually called Sumo Kyōkai, is the governing body that operates and controls professional sumo wrestling, called ōzumō (大相撲),…
Source: Wikipedia (CC BY-SA)

Hirohito

Emperor of Japan from 1926 to 1989

Hirohito , posthumously honored as Emperor Shōwa , was the 124th emperor of Japan according to the traditional order of succession, from 25 December 1926 until his death in 1989. He remains Japan's longest-reigning emperor as well as one of the world's longest-reigning monarchs.…
Source: Wikipedia (CC BY-SA)

Sumo

Japanese martial art

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.
Source: Wikipedia (CC BY-SA)