話わ頭とうわとうMeanings1nountopic; subjectformal or literaryFormal or literary term for the subject of a conversation or discussion. Not used in casual speech.会かい議ぎの話わ頭とうは環かん境きょう問もん題だいだった。The topic of the meeting was environmental issues.彼かれは話わ頭とうを変かえて、別べつの提てい案あんを始はじめた。He changed the subject and started a different proposal.