Japanese grammar
What does ～じゃん mean? Japanese grammar N3
～じゃん means isn't it…?; see, it's…! (casual assertion or realization).
| Level (estimated, JLPT framework) | N3 |
|---|---|
| Structure | V plain form + じゃん Aい + じゃん Aな（drop だ）+ じゃん N（drop だ）+ じゃん |
| Romaji | jan |
| Meaning | isn't it…?; see, it's…! (casual assertion or realization) |
Forming it
| Noun | N（drop だ）+ じゃん（雨じゃん・本当じゃん） |
|---|---|
| Verb | V plain form + じゃん（行くじゃん・行ったじゃん・行かないじゃん） |
| i-adjective | Aい + じゃん（いいじゃん・高いじゃん） |
| na-adjective | Aな（drop だ）+ じゃん（きれいじゃん・静かじゃん） |
How to use it
Used at the end of a sentence in casual conversation to make an observation, point out something obvious to the listener, or offer natural praise (equivalent to ～じゃないか with falling intonation).
- 「～じゃん」 is a colloquial contraction of 「～じゃないか」 (originating in Kanto/Yokohama dialect and now widespread in everyday spoken Japanese nationwide), used when the speaker notices or points out something obvious right in front of them: “Isn’t it…!”, “See, that’s fine!”.
- Unlike a genuine negative question, 「～じゃん」 is usually spoken with falling intonation or light final stress to express agreement or praise (「いいじゃん！」— Hey, that’s great!) or to remind the listener of something they forgot (「昨日言ったじゃん」— Didn’t I tell you yesterday?).
- Do not insert 「だ」 right before 「じゃん」 after nouns or na-adjectives: say 「雨じゃん」「元気じゃん」, not 「×雨だじゃん」.
- PRAGMATIC WARNING: This is very casual speech (register: casual), used only with friends, family, or close peers. NEVER use it with superiors, clients, elders, or in formal workplace settings (where you must switch to 「～ではないですか」 or state it politely with 「～ですね」).
Examples
これ、値段のわりにすごくいいじゃん。
Hey, this is really good for the price, isn’t it?
ほら、鍵なら机の上にあるじゃん。
Look, the key is right there on the desk, isn’t it?
明日の集合時間は九時だって、昨日ちゃんと連絡したじゃん。
Didn’t I clearly tell you yesterday that tomorrow’s meeting time is nine o’clock?
Keep in mind
- With rising intonation at the end of a sentence, 「～じゃん？」 can be used among friends to ask for light confirmation, though falling intonation for assertion is far more common.
- Never use 「～じゃん」 in standard written Japanese, news articles, business emails, or essays.
Common mistakes
-
Wrong外を見たら、もう雨だじゃん。
Looking outside, it's already raining, isn't it?
Correct外を見たら、もう雨じゃん。
Nouns attach directly to 「じゃん」 without inserting 「だ」 in between (do not say 「雨だじゃん」).
-
Wrongこの部屋、広くて静かだじゃん。
This room is both spacious and quiet, isn't it?
Correctこの部屋、広くて静かじゃん。
Drop 「だ」 after a na-adjective before adding 「じゃん」 (say 「静かじゃん」, not 「静かだじゃん」).
-
Wrong部長、今回の企画書はすごくいいじゃん。
Section Chief, this plan is pretty great, isn't it?
Correct部長、今回の企画書はとても良い内容ですね。
「～じゃん」 is casual speech and must not be used when commenting to a superior such as a department manager (部長); in the workplace, use the polite form 「～ですね」.
Exam tips
- In JLPT N3 Listening (聴解), 「～じゃん」 appears very frequently in conversations between friends to express mild surprise or remind someone of known information.
- In sentence grammar questions, watch out for the rule dropping 「だ」 after nouns and na-adjectives before 「じゃん」.