His eldest son Yataro MISHIMA became the eighth Governor of the Bank of Japan, his third son Yahiko MISHIMA became a member of the Japan's first Olympic team and his grand son Michiharu MISHIMA became the fourth President of Scout Association of Japan.
長男三島彌太郎は第8代日本銀行総裁、三男の三島弥彦は日本初のオリンピック代表選手、孫の三島通陽は第4代ボーイスカウト日本連盟総長を務めた。