What Are Japanese Teens Saying in 2026? 5 Words From the Girls’ High School Trend Awards

If you want to know what Japanese will sound like next year, don’t ask a linguist. Ask a 16-year-old.

Twice a year, the marketing company AMF publishes the JC・JK流行語大賞 — the trend awards for junior high and high school girls, based on a survey of teens themselves. It covers people, products, content and words. The first-half 2026 results came out at the end of June, and the organizers summed up the year with one striking phrase: 時間軸が溶けている — “the timeline is melting.”

What they meant: in 2026, teens don’t care whether something is new or old. If it’s fun on TikTok, it’s in. Here are five entries worth knowing.

1. ワホー (wahō) — No. 1 in words

The top word isn’t a word at all, really. ワホー is a line from a YouTube video by the YouTuber SEIKIN (the older brother of mega-YouTuber HIKAKIN) — a video from about eleven years ago.

The clip resurfaced as a TikTok sound, teens attached a pose to it, and suddenly it was being shouted in school hallways. Most of the girls using it were small children when the original video was posted. That’s the “melting timeline” in action.

Learning point: Japanese is full of exclamations like this — わーい (yay), やったー (I did it!), よっしゃ (alright!). ワホー fits right into that family.

2. ほんまやでなんでやねん知らんけど — No. 5 in words

This one is a mouthful, and it’s a song title by the group モナキ (Monaki). It’s also a perfect mini-lesson in 関西弁 (Kansai-ben), the dialect of Osaka and the Kansai region:

• ほんまやで (honma ya de) — “It’s true, I’m telling you” (standard: 本当だよ)
• なんでやねん (nande ya nen) — “Why?! / Oh come on!” — the classic comedy comeback
• 知らんけど (shiran kedo) — “I dunno, though” — added after a statement to take the pressure off

Put together, it sounds like a whole Osaka conversation in one breath. We break down Kansai dialect properly in our Kansai-ben guide.

3. モナキ — No. 1 in people

Speaking of Monaki: the four-member group topped the people category. The group is produced by Kazuyoshi Sakai, the leader of the long-running vocal group Junretsu — an unexpected source of a teen hit, and another example of generations mixing.

4. Mellojoy — No. 1 in products

The top “thing” was Mellojoy, a silicone squishy toy. Squishies are satisfying to press, perfect for short videos, and cheap enough to collect. The Japanese word for that satisfying squishy feeling? むにゅむにゅ (munyu-munyu) or ぷにぷに (puni-puni). Japanese has a sound word for everything.

5. トモダチコレクション — high in content

In the content category, the new Nintendo Switch entry in the Tomodachi Collection series — the life sim known abroad as Tomodachi Life — ranked high. A game series that first launched in 2009 being a top teen trend in 2026? The timeline is melting again.

In 2026, nostalgia isn’t about your own past. It’s about discovering someone else’s.

What this means for learners

Two takeaways:

1. Short clips drive language. Teen slang in Japan now moves at the speed of TikTok sounds. If you want to keep up, Japanese short videos are the best classroom you have.
2. Dialect is cool again. Kansai-ben phrases like めっちゃ (meccha, “super”) have already become standard across Japan. Learning a few Kansai expressions will make you sound friendlier and more natural.

Want more teen slang? Start with the one that took over social media this year: 〇〇で滅.