テンション下がる

• 読み: テンションさがる
• ローマ字: tenshon sagaru
• 漢字の分解: 下がる (sagaru, to fall/drop) — テンション is katakana loanword.
• 発音: /te.n.ɕo.n.sa.ɡa.ɾɯ/

意味

Losing energy or having one's mood drop — describes becoming deflated, disappointed, or less enthusiastic.

The opposite of テンション上がる, this phrase describes your energy and excitement levels falling. It covers everything from mild disappointment to having your mood completely killed. Universally understood and used in casual Japanese, it is the go-to expression for describing a drop in enthusiasm or spirits. Often shortened to テンション下がった (tenshon sagatta) in past tense.

例文

1. 楽しみにしてたイベントが中止でテンション下がった。
2. 朝から上司に怒られてテンション下がるわ。
3. 天気悪いとテンション下がるよね。

使い方ガイド

場面: friends, casual conversation, social media, daily life

トーン: disappointed, deflated, low-energy

正しい言い方

• 雨でBBQ中止、テンション下がるわ〜。 (BBQ cancelled because of rain — my mood just dropped.)
• テンション下がることばっかり起きる月曜日。 (Mondays where nothing but mood-killing things happen.)

避ける言い方

• 深刻な状況で「テンション下がる」は軽く聞こえる (Saying 'tenshon sagaru' about a genuinely serious or tragic situation sounds too casual and trivialising)

よくある間違い

• Using テンション下がる for serious grief or clinical depression — it is meant for everyday disappointments and mood dips, not severe emotional states

起源と歴史

Counterpart to テンション上がる, combining テンション (Japanese reinterpretation of 'tension' meaning energy level) with 下がる (sagaru, to fall/drop). Established alongside its positive counterpart in the 1990s-2000s.

文化的背景

時代: 1990s-2000s mainstream adoption

世代: All ages (universal casual expression)

社会的背景: Universal informal

地域メモ: Used across all of Japan. As common as its positive counterpart. A staple of everyday casual Japanese conversation.