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About Jargon Japan

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/

What’s new

Version 1.1 · Updated September 18, 2026

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.

App privacy

The developer, Yusuke Yamamoto, reported these privacy practices to Apple.

Data Not Linked to You

The following data, which may be collected but is not linked to your identity, may be used for the following purposes:

  • Purchases: Purchase History
  • Usage Data: Product Interaction

Used for: Analytics, App Functionality

Alternatives to Jargon Japan

Looking for apps like Jargon Japan? Here are 6 similar apps on the App Store. The highest rated is Inko: AI Language Learning (5.0/5), and all 6 are free to download.

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