By 1947, he had obtained professional 1 dan, being promoted to 2 dan in the same year. By 1955 he was 6 dan, and by 1963 he reached the peak of 9 dan.
By 1947, he had reached a high level of expertise as a 1 dan, which was later upgraded to 2 dan in the same year. By 1955, he had advanced to 6 dan, and by 1963, he had achieved the maximum rank of 9 dan.