In 1957, his 'flower design flat vase with white glaze' (白地草花絵扁壷) won the grand prize at the Milan Triennale International Industrial Art Exhibition arranged by Kenichi KAWAKATSU, but Kanjiro continued to work as a potter without rank or prize until his later years.
1957年には川勝堅一の計らいで「白地草花絵扁壷」が、ミラノ・トリエンナーレ国際工芸展グランプリを受賞するも、無位無冠の陶工とし晩年まで創作活動を行った。