Japanese Grammar Checker
Check Japanese particles, conjugation, keigo, spelling, and natural phrasing with explanations
Tool Access see who can use this tool
How to Use the Japanese Grammar Checker
Give the checker enough context to protect meaning and match the reader
Paste the Japanese Text
Enter the exact sentence or passage you plan to use. Add the intended meaning if a particle, omitted subject, or ambiguous phrase could be interpreted in more than one way.
Choose Reader and Register
Tell the Japanese grammar checker who will read the text, then select the current voice, casual form, polite style, formal writing, or business keigo. Pick a review focus and your learner level if useful.
Review Each Explained Change
Read the corrected Japanese first, then check the change table. Apply definite grammar fixes, consider optional naturalness edits, and verify names, specialist terms, dialect, and high-stakes keigo with a qualified person.
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Japanese Grammar Checker Built for Japanese
See what changed, why it changed, and which edits are optional
Japanese-Specific Error Review
Check particles, conjugation, transitive and intransitive verbs, counters, kanji, okurigana, punctuation, and likely IME conversion mistakes. The Japanese grammar checker reads each choice in sentence context instead of applying English grammar rules.
Register and Keigo Guidance
Choose casual speech, polite です・ます style, formal writing, or business keigo. The review flags unexpected register shifts and explains when a relationship or workplace convention makes one respectful form safer than another.
Required vs Optional Changes
Every important edit is labeled as a definite correction or an optional naturalness improvement. Compare the original and corrected Japanese, read a focused explanation, and keep deliberate voice, dialect, or stylistic choices.
Japanese Grammar Checker: Frequently Asked Questions
Practical answers about Japanese correction, keigo, learning, and limits
What is a Japanese grammar checker?
A Japanese grammar checker reviews Japanese writing for errors in particles, conjugation, sentence structure, spelling, kanji, punctuation, and register, then proposes a corrected version with explanations. Unlike an English spell checker, it must judge choices such as は versus が, に versus で, plain versus polite forms, and context-dependent omissions. Use the explanation table to separate definite mistakes from optional wording changes carefully, because more natural phrasing is not always the only correct phrasing.
How do I use this Japanese grammar checker?
Paste your Japanese text, identify the intended reader, and choose the register you want the finished writing to use. Add your intended meaning when a sentence is ambiguous. The Japanese grammar checker returns corrected text, a change table, a register review, and learning notes. Each change is marked required or optional and tied to a category. Compare the correction with your original before copying it, especially when the passage contains names, quotations, dialect, technical terms, or deliberate character voice.
Is the Japanese grammar checker free to use?
Yes. You can try the Japanese grammar checker with included credits. Guests receive 10 credits per day, and free registered users receive 100 credits per month. Each check uses the credit cost shown beside the tool, so the number of checks depends on passage length, settings, and the configured cost. Subscribers receive more credits according to their plan. For efficient use, combine related sentences into one passage so register and omitted subjects can be reviewed in context rather than checked as isolated fragments.
How many free credits do I get for Japanese grammar checks?
Guests receive 10 credits each day, while free registered users receive 100 credits each month. Subscription plans include additional credits based on the selected plan. Credits are not the same as a fixed number of Japanese grammar checker runs. The charge displayed for this tool determines how many checks your current balance supports. Check the credit badge before submitting a long passage, and use one focused review instead of repeatedly sending nearly identical versions with only minor changes.
Can I use the Japanese grammar checker without an account?
Yes. A guest can open the Japanese grammar checker and submit text without creating an account, using the available daily guest credits. No installation is required. Guest access receives 10 credits per day. A free account receives 100 credits per month, while subscribers receive a larger allowance based on the plan they choose. Avoid pasting confidential client data, private identifiers, or unreleased material. Replace sensitive details with neutral placeholders while preserving the grammar surrounding them.
Does the checker explain Japanese particles and conjugation?
Yes. The review can explain particle contrasts, verb and adjective inflection, tense, conditionals, passive and causative forms, and transitive or intransitive pairs when they affect your sentence. For example, a destination may require に while the place where an action occurs takes で. The Japanese grammar checker links the explanation to your actual wording. Set your writer level to beginner for simpler definitions or advanced for shorter explanations that focus on nuance and exceptions.
Can it check polite Japanese and business keigo?
The Japanese grammar checker can review consistency across plain form, です・ます style, formal written Japanese, and common business keigo, using the reader you select as context. It can flag a casual ending inside a customer email or distinguish respectful and humble forms. However, the best choice may depend on rank, relationship, industry, and company convention. Treat high-stakes apologies, contracts, and executive correspondence as drafts for human review rather than relying on an automatic correction alone.
Will a Japanese grammar checker make my writing sound natural?
It can identify many sentences that are grammatically possible yet sound translated, overly repetitive, or mismatched to the situation, then offer a clearly labeled natural alternative. Naturalness depends on audience and voice. A LINE message, university report, game character, and client email should not be flattened into the same polite textbook style. Provide the intended reader and meaning so the checker can improve word order and phrasing without changing a deliberate tone or important nuance.
Can beginners use the Japanese grammar checker for study?
Yes. Beginners can receive plain explanations for errors found in their own sentences, making the Japanese grammar checker useful alongside a textbook, teacher, or structured Japanese course. The output highlights the original form, correction, category, and reason. That connection helps learners study a particle or conjugation in a sentence they genuinely wanted to write. Do not turn every optional suggestion into a rule. Save the two learning notes, then confirm unfamiliar patterns with reliable reference material and fresh examples.
Does the Japanese grammar checker support romaji or dialect?
Japanese script gives the checker the strongest evidence. Romaji can hide kanji choices, long vowels, particles, and word boundaries, so convert it to kana and kanji when possible. Dialect and character voice can be valid, not errors. The Japanese grammar checker is instructed to preserve deliberate regional forms, quotations, and creative speech when your context identifies them. If dialect matters, name the region or character voice in the concern field and review any proposed standard-Japanese replacement as optional rather than required.
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