ちなみに

Japanese Grammar Advanced Japanese ★★★★ 4/5 neutral ちなみにchinamini
読み ちなみに
ローマ字 chinamini
形 Sentence A。ちなみに + Supplementary Information

意味

A conjunction meaning 'by the way' or 'incidentally,' used to add supplementary or tangential information related to the current topic. It connects the preceding context with an additional piece of information the speaker considers relevant or interesting.

ちなみに introduces a side note or additional detail that the speaker finds worth mentioning in relation to the current discussion. Unlike ところで, which shifts to an entirely new topic, ちなみに maintains a connection to what has already been said — the added information is related, just not central. It is especially common in conversation, presentations, and informal writing. In formal contexts, なお can serve a similar function but carries a more official or regulatory tone. ちなみに often precedes facts, statistics, personal experiences, or background knowledge that enriches the listener's understanding.

例文

  1. この映画は世界中で大ヒットした。ちなみに、日本では興行収入が歴代三位を記録している。
  2. 会議は来週の月曜日に変更になりました。ちなみに、場所は第二会議室です。
  3. 彼女は三か国語を話せる。ちなみに、そのうちの一つはアラビア語だ。

使い方ガイド

場面: spoken, written, everyday

トーン: informative

正しい言い方

  • 新しいオフィスは駅から徒歩五分です。ちなみに、駐車場も完備しています。
  • 彼は今年で勤続二十年になる。ちなみに、入社当時はまだ大学生だった。
  • この地域は夏に雨が多い。ちなみに、年間降水量は全国平均の二倍に達する。

避ける言い方

  • ちなみに、今日は火曜日です。(Using ちなみに without any preceding context to relate to) → 今日は祝日ですね。ちなみに、明日も振替休日で連休になります。
  • 明日は雨だ。ちなみに、私は猫を飼っている。(The supplementary information has no connection to the preceding topic) → 明日は雨だ。ちなみに、週末も天気が崩れるらしい。

起源と歴史

ちなみに derives from the verb 因む (ちなむ), meaning 'to be associated with' or 'to be related to.' The conjunctive form ちなみに literally means 'in relation to that,' and has been used as a discourse connector since the early modern period.

文化的背景

世代: All ages

社会的背景: Universal

関連フレーズ

また An adverb and conjunction meaning 'also,' 'again,' or 'moreover,' used to indicate repetition of an action or addition of a new but related point. It is one of the most versatile connectors in Japanese. さて An interjection or conjunction used to shift the topic of conversation or mark a transition to a new subject. It signals that the speaker is moving on from the current discussion to address something different or to begin the main point. ただ A conjunction meaning 'however' or 'but,' used to introduce a supplementary remark, reservation, or minor qualification to the preceding statement. It softens the contrast compared to しかし or だが. 更に An adverb and conjunction meaning 'furthermore,' 'additionally,' or 'even more,' used to indicate that something is being added to or escalated beyond what was already mentioned. It can express both addition and intensification. あるいは A conjunction meaning 'or,' 'alternatively,' or 'possibly,' used to present alternatives or to suggest another possibility. It connects two or more options, choices, or hypotheses within a sentence or across sentences. もしくは A conjunction meaning 'or,' used to disjunctively connect two items, ideas, or conditions. It presents mutually exclusive alternatives in a formal or official context. もっとも A conjunction meaning 'although,' 'having said that,' or 'though,' used to add a comment that partially retracts, qualifies, or puts into perspective what the speaker has just said. It acknowledges the validity of the preceding statement while introducing a counterbalancing consideration. 且つ・かつ A conjunction meaning 'and' or 'as well as,' used to connect words, phrases, or sentences to indicate that two qualities, conditions, or actions coexist simultaneously. It emphasises that both elements apply at the same time.
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