みついすみとも 三井住友 LinksSentence search for 三井住友Sentence search for みついすみともKanji details for 三, 井, 住 and 友Edit in JMdict Noun1. Mitsui Sumitomo; Sumitomo MitsuiCompany nameCompany2. Mitsui Sumitomo; Sumitomo Mitsui Discussions Log in to talk about this word.