kotonoha 言の葉 — All-in-one Japanese learning platform
Kotonoha is a Japanese learning platform designed to support learners from JLPT N5 to N1. Learn vocabulary, grammar, and kanji through structured learning paths, practice your writing, and discover Japanese content through an integrated reader — all in one place.
A better way to learn Japanese.
Learning Japanese is more than memorizing words. Kotonoha brings the essential parts of Japanese learning together in one platform, helping learners build their knowledge step by step while connecting what they learn with real Japanese content. From JLPT preparation to kanji writing and reading Japanese books and manga, Kotonoha is designed to make learning more connected, practical, and engaging.
A structured learning journey across all JLPT levels.
Connect what you study with practical Japanese content.
Vocabulary, grammar, kanji, reading, and progress in one place.
Everything you need to build your Japanese.
Kotonoha combines structured JLPT content, kanji practice, reading, vocabulary discovery, and progress tracking into one learning experience.
JLPT Learning
Study structured vocabulary, grammar, and kanji across JLPT levels from N5 to N1. Build your knowledge progressively instead of studying disconnected topics.
Kanji Writing
Practice writing kanji by hand and improve your accuracy through guided practice. Learn the kanji, practice writing it, and connect it with related vocabulary.
Integrated Japanese Reader
Read Japanese content without leaving your learning environment. Kotonoha brings EPUB, PDF, and manga reading together with tools designed to support Japanese learners.
Vocabulary Mining
Discover unfamiliar vocabulary while reading Japanese books and manga. Turn words you encounter naturally into personalized vocabulary learning material.
Sentence Practice
Put your knowledge into practice by writing Japanese sentences using the kanji and vocabulary you have already learned.
Progress Tracking
Keep track of your learning journey and see your progress across the different areas of Japanese learning.
Learn Japanese in a connected way.
Kotonoha is designed to connect learning, practice, and real Japanese content into one continuous experience.
Build your foundation with structured vocabulary, grammar, and kanji content.
Strengthen your knowledge through kanji writing and sentence practice.
Explore Japanese books, PDFs, EPUBs, and manga through the integrated reader.
Find new vocabulary naturally while reading Japanese content.
Follow your progress and continue improving step by step.
Don't just study Japanese. Read it.
Kotonoha connects Japanese learning with real content. Use the integrated reader to explore EPUBs, PDFs, and manga while building your Japanese vocabulary naturally through what you read.
Turn reading into learning.
When you encounter an unfamiliar word while reading, it can become part of your learning journey. Vocabulary Mining helps connect the words you discover in Japanese content with personalized learning material, making vocabulary learning more relevant to what you actually read.
Find vocabulary in context.
Keep useful words for further study.
Turn discovered vocabulary into personalized practice.
Learn kanji beyond recognition.
Kanji learning is not only about recognizing characters. Kotonoha gives learners a dedicated environment to practice writing kanji, improve accuracy, and connect each character with related vocabulary.
See how far you've come.
Learning a language is a long-term journey. Kotonoha helps you keep track of your progress so you can understand what you've learned, where you are improving, and what you can work on next.
Built for Japanese learners at every stage.
Start building your foundation with structured Japanese learning content.
Study progressively from N5 to N1 with organized vocabulary, grammar, and kanji content.
Create a learning routine that fits your own pace and goals.
Learn through books, manga, and other Japanese content while reading.
Learning Japanese should feel connected.
Instead of separating vocabulary, kanji, grammar, and reading into completely different experiences, Kotonoha brings them closer together. Learn something. Practice it. See it in context. Use it. Then continue.
The people behind Kotonoha.
We are working together to build a better and more connected way to learn Japanese.
Ahmed Osaka
Founder & Cyber Security EngineerLeading the vision of Kotonoha and ensuring the security and reliability of the platform.
Mostafa Desha
Co-Founder & Software EngineerWorking on the core software architecture and infrastructure behind Kotonoha.
Mohamed Eldmrdash
Software, Web & Product DeveloperBuilding the product experience, web interfaces, and digital presence of Kotonoha.
Nadia Khalaf Allah Mostafa
Japanese Instructor & Language ReviewerAssistant Lecturer at Aswan University, contributing to Japanese language accuracy and reviewing educational content.
We're here to help.
Have a question, found an issue, or have an idea that could make Kotonoha better? We'd love to hear from you.
support@kotonoha.com