Free Japanese Grammar Checker
Improve your Japanese writing with AI-powered grammar checking. From particle usage to keigo, get accurate corrections for natural Japanese.
/ 5000 words
No errors found. Great writing!
:
Corrections Found
Free: 5000 words per check. Upgrade for unlimited access.
Why Choose Our Free Japanese Grammar Checker?
Particle Precision
Japanese particles (wa, ga, wo, ni, de, etc.) are essential but tricky. Our AI understands particle usage rules and catches incorrect or missing particles in context.
Keigo & Politeness Levels
Checks for consistent and correct use of Japanese honorific language (keigo), including sonkeigo, kenjougo, and teineigo across your entire text.
Verb & Adjective Conjugation
Validates all Japanese verb and adjective conjugation forms including te-form, potential, causative, passive, and their combinations.
Free vs Premium
| Feature | Free | Premium |
|---|---|---|
| Word Limit | 5000 words | Unlimited |
| Japanese Grammar Check | Yes | Yes |
| Writing Score | Basic | Advanced |
| Auto-Fix All Errors | Yes | Yes |
| History | No | Yes |
| Priority Processing | No | Yes |
Frequently Asked Questions
Yes, our grammar checker understands the nuances of Japanese particles (ha/wa, ga, wo, ni, de, to, he, kara, made, etc.) and checks for correct usage based on sentence context and meaning.
Yes, the tool checks for correct and consistent use of Japanese politeness levels including teineigo (polite), sonkeigo (respectful), and kenjougo (humble), and flags mixing of politeness levels.
Yes, our checker works with hiragana, katakana, and kanji. It can detect incorrect kanji usage, validate okurigana, and check for correct katakana transcription of foreign words.
The Japanese te-form is used for connecting sentences, making requests, expressing ongoing actions, permission, and more. Our checker validates correct te-form conjugation for all verb groups (godan, ichidan, irregular), catches common errors like incorrect sound changes (tte, nde, ite), and checks that te-form is used appropriately in context.
Yes, Japanese uses specific counter words for different types of objects (hon for long things, mai for flat things, hiki for animals, etc.). Our tool checks that the correct counter is used with each noun and validates the sometimes irregular sound changes that occur in counting (e.g., ippon, nihon, sanbon).
Yes, Japanese has four main conditional forms, each with different nuances. Our checker validates correct formation of to (natural consequence), tara (temporal/hypothetical), ba (general condition), and nara (contextual), and flags usage that does not match the intended conditional meaning.
Yes, our Japanese grammar checker supports academic writing conventions, including the formal da/dearu style, correct use of nominalization with koto and no, proper handling of quotation structures, and consistency in the formal register expected in Japanese academic papers and reports.
Our AI-powered tool understands Japanese grammar contextually, going far beyond basic spell-checking. It catches nuanced errors in particle selection, keigo consistency, conditional form choice, and counter word usage that simpler tools typically miss. It handles the full complexity of Japanese grammar including mixed scripts and formality levels.
Our Japanese grammar checker analyzes text in just a few seconds. The AI checks grammar, particle usage, conjugation, keigo consistency, and script correctness simultaneously in a single pass, delivering comprehensive results almost instantly.
Yes, our Japanese grammar checker is fully responsive and works on all mobile devices including smartphones and tablets. You can paste or type Japanese text in any script (hiragana, katakana, kanji) directly in your mobile browser and receive instant grammar corrections without installing any app.
Non-native Japanese speakers commonly struggle with particle selection (wa vs ga, ni vs de), te-form conjugation errors, inconsistent politeness levels, incorrect counter word usage, conditional form confusion, and unnatural word order. Our checker identifies all of these and provides clear explanations for each correction.
The free version checks Japanese text using our standard AI model, which handles most grammar, particle, and conjugation corrections effectively. The premium version uses our most advanced AI for deeper analysis of nuanced patterns like keigo consistency, conditional form selection, and detailed stylistic suggestions for more natural-sounding Japanese.
Grammar Checkers for Other Languages
Check grammar in 10+ languages with our AI-powered tools