論ろん題だい

noun, noun which may take the genitive case particle 'no'

subject; theme; topic

Refers to the subject or theme of a discussion, debate, or written work. Often used in academic or formal contexts.

• 次つぎの会かい議ぎの論ろん題だいは環かん境きょう問もん題だいです。

  The subject of the next meeting is environmental issues.

• 彼かれは論ろん題だいから外はずれた発はつ言げんをした。

  He made a remark that strayed from the topic.