さいじょうこうさん 最上恒産 LinksSentence search for 最上恒産Sentence search for さいじょうこうさんKanji details for 最, 上, 恒 and 産Edit in JMdict Noun1. Saijō Kōsan (consortium)Company nameCompany2. Saijou Kousan (consortium) Discussions Log in to talk about this word.