Choose how you learn with 2hongo

Study on the web or your phone, learn with ChatGPT or Claude, or read Japanese with our browser extension.

iOS

The full app — Sensei AI, comprehension quizzes, and study progress that keeps working offline.

Android

The same full app, with widgets and offline study for phones and tablets.

Web

Nothing to install. The complete dictionary, grammar library, and reader run in any modern browser.

On a phone, use your browser's "Add to Home Screen" to run it like an app.

Open 2hongo

AI assistants

Learn Japanese with ChatGPT or Claude

Ask questions, practice useful phrases, and build on what you already know. Connect your 2hongo account to bring dictionary entries, grammar lessons, and your study record into the conversation.

Plugin

ChatGPT

Install the 2hongo Japanese tutor for explanations, sentence corrections, and guided practice. General teaching works without connecting a 2hongo account.

Get the ChatGPT plugin

Connector

Claude

Connect your 2hongo account to look up Japanese words and grammar in Claude, check your reviews, and work from your own study plan.

Connect in Claude

Try asking

Help me learn Japanese step by step. Start with what I already know and guide me from there.

Installation and account connection guide

Browser extension

Read Japanese anywhere on the web

News, Wikipedia, blog posts, documentation — select any Japanese text and a small button appears above your selection. One click breaks the sentence into words with grammar highlights, or opens the full dictionary entry. No more copying text into another tab and losing your place.

Select the text

Highlight Japanese on any page. The button only appears for Japanese, so it stays out of your way everywhere else.

Break it down

The sentence is split word by word, with grammar patterns detected and highlighted.

Or use the shortcut

Prefer the keyboard? ⌘⇧J on macOS, Ctrl+Shift+J elsewhere. Right-click works too.

Add to Chrome

Free, and works without an account.

Installs from the Chrome Web Store — works in Chrome, Edge, Brave, Arc, Opera, and Vivaldi.

One account, every platform

Sign in once and your saved words, grammar progress, and review schedule follow you between phone, desktop, and extension. A subscription bought on any platform unlocks every platform.