When you watch an anime and hear Anya Forger from Spy x Family say “waku waku,” it’s hard not to feel a smile coming automatically, right? There’s something magnetic about this Japanese expression, simple yet full of energy, that has won the hearts of many people around the world. And if you landed here because you were curious about what “waku waku” means, where it came from, how to use it, and why it’s so present in animes, you can relax: this article will tell you all that in a practical way, with direct examples and that touch of Japanese pop culture that makes any conversation more interesting.
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What does Waku Waku mean?
“Waku waku” (ワクワク) is a Japanese onomatopoeia used to express excitement or anticipation. It always appears in contexts where there is an excited wait for something, whether it’s an event, a meeting, an outing, or any novelty. It is mainly used to demonstrate inner excitement, that internal vibration we feel before a special moment.
In the case of Anya Forger, for example, every time she expects something fun to happen, or when she is about to get involved in an adventure, the “waku waku” comes out naturally. It’s an expression of spontaneity, purity, and at the same time, an onomatopoeia. In Japanese, many emotions and sounds are expressed this way – the so-called giongo and gitaigo, which are nothing more than words that reproduce sounds or feelings.

Common situations where Waku Waku is used
Want an example? Think of a child seeing the presents under the Christmas tree. Or someone who just received the news that they are going to travel to their dream place. It’s the kind of emotion that “waku waku” represents.
- Children waiting for their birthday or Christmas.
- Before opening a surprise gift.
- Before traveling to a new place.
- Anticipation to meet someone important.
- On the eve of a special event, like a concert or festival.
- Before trying a different food for the first time.
It has no relation to fear, worry, or negative anxiety. It always involves good emotion and positive energy, linked to desire and hope.
Origin and cultural context of Waku Waku
Curiosity: “waku waku” has been present in the Japanese language since the early 20th century. At first, it described more of a feeling of restlessness, but soon it came to mean this happy excitement. The term is so natural for the Japanese that it is present in daily conversations, advertising campaigns, music, and, of course, in animes.
To understand the depth of “waku waku,” it’s worth thinking about how the Japanese value self-control and discretion. Open demonstrations of emotion tend to be more subtle in Japan, so an expression like “waku waku” serves as a release valve: it shows enthusiasm without exaggeration, in a cute and socially acceptable way. It’s different from our “can’t wait!”, because it involves more of the internal feeling than urgency.
By the way, “waku waku” has even become the name of events, toys, stores, and tourist attractions in Japan. You can find the term printed on packaging and advertisements, always suggesting animated experiences or novelties.

Waku Waku in animes
It’s no coincidence that anime writers love to put “waku waku” in the mouths of charismatic or Kawaii characters. In Japanese, sound repetitions usually make the word more endearing or fun. That’s why “waku waku” sounds so natural and light, while in other languages the equivalent might seem forced.
If you are an anime fan, try to remember other classic moments: that school festival, an unexpected meeting, the discovery of a secret… The “waku waku” emerges as the summary of the energy of that moment.
Practical examples in animes
- Spy x Family: Anya always says “waku waku” before an unexpected or funny situation.
- Pokémon: Kids (and even adults!) let out a “waku waku” before catching a rare Pokémon.
- My Hero Academia: Students feel “waku waku” before a new challenge.
Example Sentences
ワクワクしています。
Waku waku shiteimasu.
I am excited. / I am looking forward to it (in a positive sense).
明日の旅行がワクワクする。
Ashita no ryokō ga waku waku suru.
I am excited about tomorrow’s trip.
クリスマスが来るのがワクワク!
Kurisumasu ga kuru no ga waku waku!
I can’t wait for Christmas!
プレゼントを開けるのがワクワク。
Purezento o akeru no ga waku waku.
I am excited to open the gift.
新しいゲームが発売されてワクワクしてる。
Atarashii gēmu ga hatsubai sarete waku waku shiteru.
I am excited about the release of the new game.


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