LESSON NOTES · レッスンノート

N4Lesson notes · Sep 30, 2026

Funny in Japanese: 面白おもしろい, おかしい and the 'funny' that means something's wrong

"Funny" in English is two words hiding in one: 面白おもしろい (omoshiroi) covers the ha-ha and the interesting, while おかしい (okashii) covers the strange and the wrong — and mixing them up can turn a compliment into an insult.

English lets you say "that movie was funny" and "the laptop is acting funny" with the same word. Japanese refuses. Split the meaning first, pick the word second, and most of the confusion disappears.

The basics

What does "funny" mean in Japanese?

It depends which "funny" you mean. English uses it for two different ideas, and Japanese gives each its own word:

  • ha-ha funny (makes you laugh) → 面白おもしろい, 笑わらえる
  • strange funny (something is off) → おかしい, 変へん(へん)

The quickest test is to ask: "Am I laughing, or am I worried?" Laughing means 面白おもしろい family. Worried, puzzled or suspicious means おかしい family.

Word Ha-ha (laughing) Strange (something's off) Typical scene
面白おもしろい Yes No — it means "interesting" too Comedy, books, games, people you like
笑わらえる Yes, it makes you laugh No A video, a joke, a situation
爆笑ばくしょう Yes, huge laughter No Laughing out loud with friends
草くさ / w Yes, online only No Chat, comments, social media
おかしい Sometimes, in a silly way Yes, wrong or suspicious A broken machine, a lie, an odd result
変へん No Yes, odd or weird A strange person, smell, habit

Does 面白おもしろい only mean "funny"?

No, and this is the biggest trap. 面白おもしろい is closer to "interesting" or "engaging" than to "funny." It says the thing held your attention.

この本ほん、面白おもしろいよ。 — This book is good, you should read it. (casual, could be a thriller, a history book, anything gripping) あの映画えいが、面白おもしろかった。 — That movie was great. (casual, not necessarily a comedy)

A 面白おもしろい book is not necessarily a comic one. If you want to say it made you laugh, add a word that says so.

この漫画まんが、面白おもしろすぎて笑わらった。 — This manga was so good I laughed. (casual, laughter added on purpose)

How do you say "it made me laugh" or "that's funny"?

Use 笑わらえる. It is the verb 笑わらう (to laugh) in the "can" form, and it means "you can laugh at it" — in other words, it is genuinely funny.

この動画どうが、めっちゃ笑わらえる。 — This video is hilarious. (casual, friends) あの話はなしは笑わらえないよ。 — That's not funny. (casual, serious tone, sometimes said when a joke went too far)

笑わらえない is worth learning early. It is the natural way to say "that's no laughing matter."

Beyond the basics

What about ウケる, 草くさ and 爆笑ばくしょう?

These are the casual and internet versions, sorted by volume.

爆笑ばくしょう (ばくしょう) means bursting into big laughter. You can use it as a noun or a verb.

みんな爆笑ばくしょうしてた。 — Everyone burst out laughing. (casual, spoken or written) 爆笑ばくしょうした! — I cracked up! (casual, texting a friend)

ウケる is the everyday "that's hilarious" among younger speakers. We have a full breakdown in ウケる meaning in Japanese, so here is the short version: 「それウケる」 means "that's a riot," and it can also mean a joke landed.

Online, people just type 草くさ (kusa, literally "grass") or a row of w. This grew out of 笑わらい (warau) being shortened to w, then w looking like blades of grass. The whole story is in 草くさ (kusa) meaning in Japanese slang.

それ、草くさ。 — That's hilarious. (casual, chat or comments, not for speaking politely)

All three are for friends and screens. In a meeting or with a new acquaintance, stay with 面白おもしろい or 笑わらってしまいました.

When does おかしい mean "strange"?

おかしい really has two lives. It can mean "amusing," but in modern speech it usually means "something is off," "wrong" or "suspicious."

このパソコン、おかしい。 — This computer is acting up. (casual, it is broken or behaving strangely) 味あじがおかしい。 — The taste is off. (casual, maybe the food went bad) その話はなし、おかしくない? — Doesn't that story sound off? (casual, you suspect a lie)

So 「このパソコン、おかしい」 is not a joke about the laptop. It means it is not working right. This is the "funny" of "there's something funny going on."

You can also hear おかしい for real amusement, usually with a laugh built in.

おかしくて、涙なみだが出でた。 — It was so funny I cried. (casual, older or slightly bookish)

Here the meaning is ha-ha, but this use is rarer than 面白おもしろい or 笑わらえる. If you are not sure, assume おかしい means something is wrong.

What's the difference between おかしい and 変へん?

Both point at something odd, but the feel is different.

変へん (へん) is "weird" or "unusual." It describes a thing or a person as different from the norm. おかしい is "wrong" or "off" — it suggests something has failed, or it does not add up.

この匂におい、変へん。 — This smell is weird. (casual, unusual, not necessarily bad) この匂におい、おかしい。 — This smell is off. (casual, something is probably wrong)

変へん also has a whole world of phrases. For how a "weird look" works, see 変へんな目めで見みられる.

Is there an anime example?

Very often. When a character notices a clue that does not fit, you will hear something like this:

なんか、おかしいな…。 — Something's off... (casual, muttered, the detective moment)

In anime this line is a signal: the plot is about to turn. It is never a joke line.

People: 面白おもしろい人ひと, 変へんな人ひと and おかしい人ひと

Same word family, very different effect when you describe a person.

Phrase What it says Safe to say?
面白おもしろい人ひと Fun, interesting, makes me laugh Yes, a compliment
変へんな人ひと Odd, unusual, hard to understand Careful, depends on tone
おかしい人ひと Wrong, not normal, possibly crazy No, often quite rude

彼かれは面白おもしろい人ひとだよ。 — He's a fun guy. (casual, positive) 彼かれは変へんな人ひとだよ。 — He's a strange guy. (casual, could be affectionate among friends, could be a dig) 彼かれはおかしい人ひとだよ。 — He's a wrong-in-the-head person. (casual, this is an insult)

The first is warm. The second is a coin flip. The third is usually rude, because it suggests something is wrong with the person, not just different. If you want to describe someone's personality kindly, our list in Japanese personality adjectives has safer words.

Common mistakes

  • Using おかしい to mean "hilarious." In modern conversation, おかしい about a person or thing usually sounds like "off" or "wrong." Use 面白おもしろい or 笑わらえる for ha-ha.
  • Thinking 面白おもしろい always means a comedy. 面白おもしろい means interesting. A serious novel can be 面白おもしろい without making anyone laugh.
  • Saying おかしい人ひと as a compliment. It is an insult. If you mean "funny person," say 面白おもしろい人ひと.
  • Using 草くさ or ウケる in polite situations. They are friends-and-chat words. Keep them out of email and meetings.
  • Translating "funny" word for word. Decide first: ha-ha or strange. Then pick the Japanese.

Practice

Choose the word before opening the answer. Questions 5 and 6 are a pair — the same word aimed at a laptop and at a person.

1. You want to say "This video is hilarious" to a friend. Which word fits best, 笑わらえる or おかしい?

Show answer

笑わらえる — この動画どうが、笑わらえる. おかしい would sound like the video is broken or suspicious.

2. A friend says その本ほん、面白おもしろかった. Does that mean the book was a comedy?

Show answer

Not necessarily. 面白おもしろい means "interesting" or "engaging," so the book could be a thriller or a history book.

3. How do you say "That's not funny"?

Show answer

笑わらえない — the negative of 笑わらえる. 「それは笑わらえないよ」 says it is no laughing matter.

4. Someone bursts out laughing with a big laugh. Which noun describes that?

Show answer

爆笑ばくしょう — 爆笑ばくしょうした means "I cracked up." It is the big-laugh version of 笑わらう.

5. You type 「このパソコン、おかしい」. What are you telling the reader?

Show answer

The computer is acting strangely or is broken. おかしい here means "off" or "wrong," not "amusing."

6. You say 「彼かれはおかしい人ひとだ」 about a coworker. How does it land?

Show answer

Rude. おかしい applied to a person says something is wrong with them. If you meant fun, use 面白おもしろい人ひと. This is the pair to question 5: the same word, but a person makes it an insult.

7. Which is closer to "weird," 変へん or おかしい?

Show answer

変へん — it describes something unusual. おかしい leans toward "wrong" or "off," as if something has failed or does not add up.

8. In a group chat, someone writes 草くさ. What do they mean?

Show answer

"That's hilarious." 草くさ comes from w (笑わらい), which looks like grass. Use it with friends online, not in polite situations.

9. A detective mutters なんか、おかしいな… in an anime. Is it a joke?

Show answer

No. It means "something is off" — a clue that does not fit. It is a plot signal, not humour.

A trial lesson is a good place to tell me about something 面白おもしろい that happened and something おかしい that worried you, so the two kinds of funny stay apart.

FAQ

Is 面白おもしろい the same as funny? Only partly. 面白おもしろい covers funny, but also interesting, engaging and fun. Add 笑わらえる or 笑わらった if you want to make the laughter clear.

Can おかしい mean funny in the ha-ha sense? Yes, but it is less common today. In conversation it usually means strange, suspicious or broken. Reach for 面白おもしろい or 笑わらえる for ha-ha.

What's the difference between 変へん and おかしい? 変へん is odd or unusual. おかしい is off or wrong. 変へんな匂におい is an unusual smell; おかしい匂におい is a smell that suggests a problem.

Is 変へんな人ひと rude? It depends on tone and closeness. Among friends it can be fond. To a stranger, or as a description of someone you do not know well, it can sound like criticism.

Is 草くさ a word I can say out loud? People do say くさ aloud among friends, but it is mainly a written, online word. Do not use it with someone you have just met.

How do I say "funny person" safely? 面白おもしろい人ひと. It is warm and it sounds like praise. Avoid おかしい人ひと, which usually sounds like an insult.

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.

面白い	おもしろい — interesting, fun, funny
おかしい	おかしい — strange, off, wrong (also amusing)
変	へん — weird, odd
笑える	わらえる — funny, makes you laugh
笑えない	わらえない — not funny, no laughing matter
爆笑	ばくしょう — bursting into big laughter
ウケる	うける — hilarious (casual slang)
草	くさ — lol (internet slang, from grass)
笑う	わらう — to laugh
匂い	におい — smell
涙	なみだ — tears

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, where "funny" is a very common source of confusion. 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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