Jargon Japan
Japanese Slang Dictionary
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Real Japanese slang, explained in English with comic cards. 36 phrases with examples and culture notes. Offline. No account, no ads. Private by design.
Jargon Japan is a Japanese slang dictionary with comic-style illustrations. Textbooks teach you polite Japanese. This app teaches you the words people actually use online, at work, and with friends.
WHAT'S INSIDE
- 36 slang phrases, each with its own full-color comic card
- Plain-English explanations of meaning and nuance
- Example sentences with romaji readings
- Culture notes on when (and when not) to use each phrase
- Variations and related expressions
LEARN YOUR WAY
- Flip each card to test yourself before revealing the meaning
- Six decks to browse: All, Now, Common, Retro, Jargon, and a personalized For You
- Answer a few quick questions (all optional) and get a personalized "For You" order
- Save the ones you want to keep to your own list
PRIVATE BY DESIGN
- Works fully offline
- No account, no sign-up
- No ads
- Only anonymous usage stats, never your answers. Turn them off anytime in Settings
- Your answers, saved list, and progress stay on your device and can be deleted in Settings
WHO IT'S FOR
- Japanese learners who want to understand real conversations
- Fans of anime, manga, and Japanese social media
- Anyone curious about how people in Japan actually talk
Start with 36 essential slang words — from "yabai" to "kusa" — and sound a little more like a local.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Now you can hear it. Tap the speaker on any card to hear the phrase — and its example sentence — read aloud in Japanese. Like the rest of the app, it works offline.
Also new: Jargon Japan Premium, an optional upgrade that adds a second set of phrases, each with its own comic card, example sentence, and usage guide. The free phrases stay free, and you still don't need an account.
The developer, Yusuke Yamamoto, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Yusuke Yamamoto
- Size
- 20.7 MB
- Category
- Education
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
13+
- 13+
- Infrequent
Mature or Suggestive Themes
- In-App Purchases
Yes
- Jargon Japan Premium $69.99
- Jargon Japan Premium $29.99
- Jargon Japan Premium $4.99
- Copyright
- © 2026 AiY Lab