In 1925, Benzo succumbed to palsy, and in September his wife who had been sitting by Benzo's bed passed away, and on December 12 he died at home located at 9-chome, Nishi 2-jo (West 2), Obihiro-cho.
大正14年には勉三が中風症に倒れ、9月には勉三の看病をしていた妻が亡くなり、12月12日勉三は帯広町西2条9丁目の自宅で息を引き取った。