石せき油ゆ開かい発はつ公こう団だんMeaningsNoun1. Japan Petroleum Development CorporationKanji used石stone油oil開open発let out公public団groupComposed of石せき油ゆoil; petroleumNoun開かい発はつdevelopment; cultivation; application; exploitation (of resources)Noun公こう団だんpublic corporation; public housingNoun