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Today in History: Tokyo Grand Sumo Association transforms into All Japan Sumo

12/28/2025

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Summary

Story summary

On December 28, 1927, the Tokyo Grand Sumo Association transformed into the All Japan Sumo Association, initiated by Prince-Regent Hirohito. This pivotal change established the world's only professional sumo organization, shaping the future of the sport and solidifying its significance in Japanese culture.

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Story summary

On December 28, 1927, the Tokyo Grand Sumo Association transformed into the All Japan Sumo Association, initiated by Prince-Regent Hirohito. This pivotal change established the world's only professional sumo organization, shaping the future of the sport and solidifying its significance in Japanese culture.