日本にっぽん社しゃ会かい党とうMeaningsNoun1. Japan Socialist Party (1945-1996; succeeded by the Social Democratic Party of Japan); JSP (Historical)Other readings日本にほん社しゃ会かい党とうKanji used日sun本book社company会meeting党political partyComposed of日本にっぽんJapanNoun社しゃ会かい党とうSocialist PartyNoun