KanjiGrinder - Learn Japanese with AI-Powered Flashcards

Flashcards Enhanced with AI and Spaced Repetition (SRS)

A clean, efficient way to learn kana, kanji, vocabulary, and prepare for the JLPT (N5–N1)

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Paul Alex, creator of KanjiGrinder

About KanjiGrinder

I'm Paul Alex — also known as Toishi, a nod to the whetstone or “tool grinder.” After trying dozens of Japanese learning apps and struggling to find one that truly fit my needs, I came to a realization: the tools themselves were often part of the problem. That’s why I built KanjiGrinder — a focused flashcard system enhanced with spaced repetition and AI support, designed to help you learn faster, not longer.

From one thing, know ten thousand things. — Miyamoto Musashi

Why Another App for Japanese Learning

Many learners struggle with Japanese study apps that feel cluttered, overloaded with gamification, ads, or overwhelming interfaces. They’re often hit with too much information at once, making it hard to stay focused or retain what truly matters. Progress can feel slow due to weak spaced repetition systems or bloated lesson structures, and many platforms lock users into rigid learning paths with little flexibility. Some even seem designed to prolong the study process just to increase subscription time, rather than help learners advance efficiently.

Difference

KanjiGrinder is built to streamline your journey — no bloat, no fluff — just effective study powered by what actually works.

  • Clean yet pleasant UI
  • Users are free to customize their study elements
  • Ask AI to get more info about Kanji's meaning, its use context, etc.
  • Spaced Repetition System for review and better memorization

Begin Your Journey.
Start Learning Japanese with KanjiGrinder

No credit card needed.