Kunkun

Checks Japanese grammar and suggests improvements.

Kunkun checks your Japanese grammar in real time, directly in your browser — no copy-pasting into a separate tool. It works inside Gmail, Google Docs, Notion, and most text fields. When it finds an issue, it explains what's wrong and why, so you actually learn from the correction. WHAT IT CHECKS • Grammar errors and unnatural phrasing • Keigo (polite/formal Japanese) — is your level right for the situation? • Formality — too casual for a business email? Too stiff for a friend? • Natural rewriting suggestions WHO IT'S FOR • JLPT studiers (N5–N1) practicing written Japanese • Job seekers writing 就活 emails and cover letters • Professionals sending business emails in Japanese • Anyone writing Japanese who wants a second opinion before hitting send FEATURES • Real-time checking as you type • Explanations in English and Japanese • Works in Gmail, Google Docs, Notion, and more • Adjustable strictness and formality level • Check history so you can review past corrections • Batch mode for checking multiple texts at once Free during beta. No account required to try it. Questions or feedback: kunkun@kunkun.io