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Your AI assistant for learning Japanese.

文法ーCHECK is an AI-based assistant made to help you learn Japanese. You can check your Japanese sentences for grammatical errors, have discussions with an AI regarding how to improve, and more.

10,000,000+

sentences checked

300,000+

site visitors

250,000+

explanations & chats

4 years, 2 months

since we started

⚠️ The AI can make mistakes. Please double-check important information.

How it works

Editor

Enter the text you would like to check. The AI model will check it and underline any suggestions, like this:

これペンです。

  • Click the suggestion to apply it.

  • Click the button to remove the suggestion.

  • Click the button to ask the AI to explain the suggestion in a new chat.

There are currently 2 different modes for text checking in the Editor:

Bunpo Check Mode

Highlight grammatical mistakes and spelling errors

Tone Check Mode

Correct text to casual, normal or keigo politeness

Parse Mode is slightly different. It splits your text into grammatical parts:

これペンです

Click any of the parts to see more details, readings and definitions.

Parse Mode NEW

Split text into grammatical parts, check readings and definitions

Threads

Threads are discussions between you and the AI.

  • Explanation threads are opened when you click the button on a suggestion.

  • Click the button in the Messenger to create a new question thread and have more general discussions.

  • Type your messages and click to send.

There are currently 2 different types of Threads:

Explanation Thread

Explain a suggestion and discuss with the AI in a thread

Question Thread

Discuss any questions about Japanese with the AI

Usage limits

Each feature has usage limits set. If you exceed those limits, you won't be able to use the feature until the next day.

Usage counters reset at midnight.

About

Bunpo Check was started in February 2021 to help Japanese learners work on their output skills. Since then, we've helped more than 300,000 people check their Japanese text. We hope you find Bunpo Check useful in your studies.

Dictionary glosses and frequency data for Parse Mode come from JMdict, a fantastic Japanese dictionary actively maintained by Jim Breen and a team of volunteers.

Note that data entered on this site may be used for improving the service, including training future AI models.

Contact

If you have any questions or want to get in touch, send an email to hello@bunpo-check.com!

Try out the new Parse Mode for readings, definitions and more!