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Koji Chubachi (Chubachi Koji, 25 February 1985) is a Japanese instructor of Shotokan karate.^[1]

He is currently an instructor of the Japan Karate Association.^[1]

Koji Chubachi was born in Yamagata Prefecture, Japan on 25 February 1985. He studied at Teikyo University. His karate training began when he was 7 years old.

Koji Chubachi has had considerable success in karate competitions.

• 12th Funakoshi Gichin Cup World Karate-do Championship Tournament (Pattaya, 2011) - 2nd Place Kumite
• 13th Funakoshi Gichin Cup World Karate-do Championship Tournament (Tokyo, 2014) - 1st Place Kumite

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