During a visit to the Budokwai by Jigoro Kano, the founder of Kodokan judo, in 1920, Tani was awarded the second-degree black belt rank in judo.
In 1920, during a trip to the Budokwai, Jigoro Kano, the founder of Kodokan Judo, bestowed upon Tani the second-degree black belt rank.