LESSON NOTES · レッスンノート

N4Lesson notes · Oct 4, 2026

Excited in Japanese: ワクワク (wakuwaku), 楽たのしみ, 興奮こうふん, and which one fits

Excited in Japanese is most often ワクワク (wakuwaku), a light, happy feeling of anticipation — but 楽たのしみ, ドキドキ, 興奮こうふんする, テンションが上あがる and 盛り上もりあがる each cover a different kind of "excited," and picking the wrong one changes the meaning.

English uses one word for a child before a trip, a fan at a concert, and a racing heart before a speech. Japanese splits those into separate words, and one of them (興奮こうふんする) can land far too strongly if you use it for ordinary happiness. This post sorts them by what you actually feel and what you want to say.

The basics

How do you say "I'm excited" in Japanese?

The everyday answer is ワクワクする (wakuwaku suru), or ワクワクしている for "I am feeling excited right now." It describes happy anticipation, usually before something good. The sound is an onomatopoeia, so it is often written in katakana or hiragana (わくわく).

明日あしたの旅行りょこう、ワクワクする! — I'm so excited for tomorrow's trip! (casual, spoken) 新あたらしいゲームでワクワクしています。 — I'm excited about the new game. (polite) ワクワクが止とまらない! — I can't stop being excited! (casual, very common in anime and ads)

If you only learn one word from this post, learn this one. It is safe, positive, and natural at any age.

How do you say "I'm looking forward to it"?

Use 楽たのしみ (たのしみ). It means "something to look forward to," and it is the standard way to say you are excited about a future event.

明日あしたが楽たのしみです。 — I'm looking forward to tomorrow. (polite, safe at work) 楽たのしみ! — Can't wait! (casual, one word is enough) お会あいできるのを楽たのしみにしています。 — I'm looking forward to meeting you. (polite, business-friendly)

楽たのしみ is calmer than ワクワク. ワクワク describes the bubbling feeling in your body; 楽たのしみ names the event as something good that is coming. In emails and at work you will use 楽たのしみにしています far more than ワクワク. If you are mixing it up with the plain adjective 楽たのしい, see our post on fun in Japanese.

What is the difference between ワクワク and ドキドキ?

Both are heartbeat sounds, but the mood is different. ワクワク is happy and forward-looking. ドキドキ is a pounding heart, and it can be happy or nervous.

遠足えんそくの前の日まえのひはワクワクして眠ねむれない。 — The day before the school trip I'm too excited to sleep. (casual, pure anticipation) 発表はっぴょうの前まえでドキドキする。 — My heart is pounding before the presentation. (casual, nervous) 好すきな人ひとの前まえでドキドキする。 — My heart races in front of the person I like. (casual, romantic excitement)

A quick test: if you could add "I can't wait," use ワクワク. If you could add "I hope it goes well," use ドキドキ. For the nervous side, see nervous in Japanese.

Beyond the basics

What does 興奮こうふんする mean, and why be careful with it?

興奮こうふんする (こうふんする) means "to become aroused or stirred up," and it is stronger and more physical than ワクワク. It fits intense moments: a thrilling match, a roller coaster, a heated argument.

試合しあいが面白おもしろくて、興奮こうふんした! — The match was so good that I got hyped up! (casual, sports) 興奮こうふんして眠ねむれなかった。 — I was so wound up I couldn't sleep. (neutral, strong feeling) ちょっと落ち着おちついて。興奮こうふんしすぎだよ。 — Calm down a bit. You're overexcited. (casual, a friend settling someone down)

Here is the gentle warning. In some contexts 興奮こうふんする is also the word used for sexual arousal, and it can sound intense or even angry ("worked up"). If you say 彼かれに会あえて興奮こうふんしています to mean "I'm excited to meet him," the listener may hear something stronger than you intended. For ordinary happy anticipation, choose ワクワク or 楽たのしみ instead. Keep 興奮こうふん for big, loud, adrenaline-heavy moments, and for talking about being overstimulated.

What does テンションが上あがる mean?

テンションが上あがる (literally "the tension goes up") means your mood or energy rises. It comes from English "tension," but in Japanese it means "high spirits," not stress. This is a classic wasei (Japanese-made) usage.

このBGM、テンション上あがる! — This music gets me pumped! (casual, a reaction to something right now) 新あたらしい靴くつを買かってテンションが上あがった。 — I bought new shoes and my mood lifted. (casual) 今日きょうはテンション高たかいね。 — You're really hyped today. (casual, describing someone's energy)

Notice that テンションが上あがる reacts to something happening now, while ワクワク often looks ahead. The opposite is テンションが下さがる (the mood drops). Do not use "tension" in the English sense of stress when you speak Japanese; the word means something different here. Plenty of other borrowed words fool English speakers like this, and 和製わせい英語えいご shows why マンション is not a mansion and コンセント is not consent.

How do you say a party or crowd gets lively?

盛り上もりあがる (もりあがる) means "to liven up" and is about a group, not one person's feelings. A party, a concert, a conversation, or a game can 盛り上もりあがる.

昨日きのうのパーティーは盛り上もりあがった! — Yesterday's party was a blast! (casual, a group event) みんなでアニメの話はなしをして盛り上もりあがった。 — We all got into a lively talk about anime. (casual) 盛り上もりあがってきたね! — Now it's getting good! (casual, the energy is building)

If you say 私わたしは盛り上もりあがった about yourself alone, it sounds odd. Use ワクワク for your own feeling and 盛り上もりあがる for the atmosphere of a group.

What about はしゃぐ?

はしゃぐ means "to romp, to get giddy," acting excited in a loud, playful way. It is often used for children, or for adults acting like children.

子こどもたちが海うみではしゃいでいた。 — The kids were splashing around happily at the beach. (neutral, observing) ごめん、ちょっとはしゃぎすぎた。 — Sorry, I got a little carried away. (casual, mild apology)

はしゃぐ can be gentle teasing, so use it for others lightly. Calling a grown-up はしゃいでる may sound a bit mocking.

How does ワクワク sound in anime?

You will hear ワクワク constantly in anime, partly because it is such an expressive sound. Anya's わくわく in SPY×FAMILY is widely known, and it is her catchphrase. Characters often say ワクワクするぜ! or ワクワクしてきた! ("I'm getting excited!") before a big battle or adventure. The ぜ and the 〜てきた make it sound energetic, a little boyish, and very much like a hero's line. In daily life, you can say the same thing in a softer way with ワクワクしてきた。

Common mistakes

  • Using 興奮こうふんする for everyday happiness. It can sound intense or awkward. Say ワクワクする or 楽たのしみです instead.
  • Using ワクワク at work to a client. It is cheerful but casual. Use 楽たのしみにしております or 楽たのしみにしています in business emails.
  • Mixing up ワクワク and ドキドキ. ワクワク is eager joy; ドキドキ is a pounding heart that may be nervous.
  • Using 盛り上もりあがる for a single person's feelings. It describes a group, a party, or a conversation.
  • Reading テンション as stress. In Japanese, テンションが高たかい means "in high spirits," not "tense."

Which word should you use?

Word Meaning Best for Feel
ワクワク happy anticipation trips, new games, good news light, positive, casual
楽たのしみ looking forward future events, work and polite use calm, safe in any register
ドキドキ heart pounding nerves or romance casual, emotional
興奮こうふんする intensely stirred up matches, thrills strong, may sound intense
テンションが上あがる mood goes up reacting to music, shopping casual, wasei
盛り上もりあがる a group livens up parties, chats casual, about the atmosphere
はしゃぐ romp, get giddy kids, playful moments casual, a bit teasing

FAQ

Is ワクワク an adjective or a verb? It is an onomatopoeia that works with する. You say ワクワクする (I get excited) or ワクワクしている (I am excited). You can also use it as an adverb: ワクワクしながら待まつ means "to wait with excitement."

Can I say 興奮こうふんしています to mean "I'm excited"? It is grammatical, but it can sound too intense or too physical. If you only want to say you are happy and looking forward to something, ワクワクしています or 楽たのしみです is safer.

What is the difference between 楽たのしみ and 楽たのしい? 楽たのしい is "fun" (a feeling while it is happening, or a quality of something). 楽たのしみ is "something to look forward to" (a feeling about the future). 明日あしたが楽たのしみ is "I'm looking forward to tomorrow"; 今日きょうは楽たのしかった is "today was fun."

How do I say "I'm excited" to someone at work? Use 楽たのしみにしています. In very polite settings, 楽たのしみにしております. ワクワク is friendly but casual, so save it for colleagues you know well.

How do I say "get excited!" or "let's get hyped"? Say 盛り上もりあがっていこう! for a group ("let's make this lively"). For a friend, テンション上あげていこう! works. Both are casual.

Practice

Build each answer before opening it. Questions 3 and 4 are a pair, because they separate happy anticipation from a pounding heart.

1. Say "I'm excited for tomorrow's trip" in casual Japanese.

Show answer

明日あしたの旅行りょこう、ワクワクする — ワクワクする is the standard word for happy anticipation.

2. You are emailing a client. How do you say "I'm looking forward to meeting you"?

Show answer

お会あいできるのを楽たのしみにしています — 楽たのしみ is calm and safe in business, while ワクワク is too casual.

3. Your heart is racing because you are about to give a presentation. Which word fits, ワクワク or ドキドキ?

Show answer

ドキドキ — a pounding heart from nerves. ワクワク is for happy anticipation.

4. The day before a school trip you can't sleep because you can't wait. Which word fits, ワクワク or ドキドキ?

Show answer

ワクワク — pure, happy anticipation. This is the pair to question 3.

5. Why should you be careful about saying 興奮こうふんしています for "I'm excited to meet him"?

Show answer

興奮こうふん is strong and can also mean arousal, so it may sound intense or awkward. Say ワクワクしています or 楽たのしみです instead.

6. The music is great and your mood rises. Say it casually.

Show answer

この曲きょく、テンション上あがる — テンションが上あがる means your mood or energy rises. It is not the English "tension" of stress.

7. Yesterday's party was lively. Which verb do you use?

Show answer

盛り上もりあがった — 盛り上もりあがる describes a group or atmosphere getting lively.

8. The kids were playing happily and loudly at the beach. Which word describes them?

Show answer

はしゃいでいた — はしゃぐ means to romp or get giddy, often about children.

9. What is the difference between 楽たのしい and 楽たのしみ?

Show answer

楽たのしい is "fun"; 楽たのしみ is "something to look forward to." 今日きょうは楽たのしかった talks about the past; 明日あしたが楽たのしみ talks about the future.

During a trial lesson, tell a teacher what you are looking forward to this month and pick ワクワク, 楽たのしみ or 興奮こうふん to match how strongly you mean it.

Vocabulary from this article

Tap the block to select all of it, then copy. In Anki: File → Import, note type Basic, separator Tab — the first column becomes the front, the second the back.

ワクワク	ワクワク — excited, thrilled (anticipation)
楽しみ	たのしみ — looking forward to
楽しい	たのしい — fun, enjoyable
ドキドキ	ドキドキ — heart pounding
興奮する	こうふんする — to get excited, stirred up, aroused
テンションが上がる	テンションがあがる — to get hyped, mood rises
盛り上がる	もりあがる — to liven up (a party, a crowd)
はしゃぐ	はしゃぐ — to romp, to get giddy
旅行	りょこう — trip
眠る	ねむる — to sleep
落ち着く	おちつく — to calm down
お会いする	おあいする — to meet (humble)

I'm Yuuki, a Japanese teacher based in Tokyo. I've taught on italki as a Top 1% teacher and watched over 1,500 anime, so most of the example sentences on this blog come from lines I've actually heard students ask about — including this one, which comes up whenever learners want to sound happy in Japanese without sounding too strong. For practice with feedback, Book a trial lesson · $13, or work through Japanese practice exercises first.

Sources: the author's own lessons and standard reference grammars.

More drills like the ones above, plus a timed JLPT-style mock test: Practice · N4 · Read something at this level: JLPT N4 stories with audio

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