Zistica MOJIIQ

AI Japanese grammar checker for JLPT learners

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March 18, 2026 I built a free Japanese grammar checker that explains why you're wrong, not just what's wrong.

Hey IH — I'm Amit, building MOJIIQ.

The problem: every Japanese learner tool I tried flagged errors but never explained the underlying grammar rule. You'd fix the mistake, make it again tomorrow, and never actually learn.

So I built MOJIIQ — a Chrome extension that checks your Japanese in real time on Gmail, Slack, Notion, Discord, and any site you use. It doesn't just correct you, it shows:

  • The grammar rule you broke

  • Why the correction works

  • A native phrasing alternative (for advanced learners)

It's calibrated to JLPT levels N5–N1 so the feedback matches where you actually are.

Free tier is generous — no account needed to start.

Would love feedback from anyone learning Japanese or building in EdTech/language learning.

https://mojiiq.zistica.com

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I kept making the same Japanese grammar mistakes — wrong particles, broken verb conjugation — and every tool I tried just underlined the error without explaining why. I wanted something that teaches as it corrects, ca