トピックtopikku

1. nountopic
   今日きょうのトピックは「北朝鮮きたちょうせんによる日本人にほんじん拉致らち問題もんだい」です。↗

   Today's topic is "the problem of Japanese people abducted by North Korea".

• Synonym主題しゅだいWrittenThe central idea or theme running through a work or paper; leans toward written prose. 「トピック」 points to the topic being discussed, such as a news item.
• Synonym話題わだいNeutralWhat people talk about; the everyday word for conversation topics, also 'much talked about' as in 「話題の店」. 「トピック」 is mostly for columns and news items.
• SynonymテーマNeutralA loanword for the theme or central concern running through the whole; broader in scope than 「トピック」, which covers a single item raised.
• RelatedモチーフNeutralA loanword for the motif of an artwork — what inspired it or a recurring design; an art-world term, not used for topics of conversation.
• Related件けんNeutralA concrete matter or affair, as in 「例の件」; it points to the thing itself rather than a subject up for discussion.
• Related題だいNeutralThe title or name given to a work or essay — the name itself, not the discussion; also a counter for test questions.
• Related題目だいもくNeutralThe title of a book or article, or the subject of research or debate as in 「論文の題目」; in religion it also names the Nichiren chant.
• Related題材だいざいNeutralThe material drawn on for a work, study, or talk, as in 「小説の題材」 or 「話の題材」; it stresses the source material, while 「トピック」 is the topic itself put up for discussion.
• RelatedサブジェクトNeutralA loanword seen in set uses like email subject lines and school subjects; its range is narrow and it is not used for everyday topics of talk.

Use 「トピック」 for topics raised in news items or on discussion boards, as in 「今日のトピック」. Everyday talk is 「話題」; the theme running through a whole work is 「テーマ」; the central idea of a work or paper is 「主題」. 「題材」 is source material, 「件」 a concrete matter, 「題」 and 「題目」 titles or set subjects, 「モチーフ」 an artistic motif, 「サブジェクト」 an email subject or school subject.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 論題ろんだい、話題わだい