Real-time Create ExposureJapanese Growth 100x
Japanese mastery requires more exposure! We integrate high-frequency vocabulary into content you already love,
transforming your daily English media into Japanese learning opportunities.Japanese mastery requires more exposure! We integrate high-frequency vocabulary into content you already love, transforming your daily English media into Japanese learning opportunities.
Real-time ExposureJapanese Growth 100x
Boost Japanese through daily content exposure,
integrating vocabulary naturally as you browse.Boost Japanese through daily content exposure, integrating vocabulary naturally as you browse.
RiesIs Different
We don't offer any language learning courses
Integrated Into Every Article and Video You Watch
We explore the content scenarios you're viewing and create appropriate Japanese exposure in real-time. This is truly a treasure you haven't realized.
AI Transforms Your Content, Creating Japanese Exposure
AI analyzes your content and selects appropriate transformation methods, from words to phrases, from short sentences to long sentences, continuously creating extensive exposure, letting you unconsciously acquire Japanese.
Especially the Large Volume of English Content You're Viewing
You read over 20,000 words of English content daily, but less than 1% exposes you to Japanese. For every 1% we increase, it's equivalent to taking 10 additional Japanese classes.
Pressure Control That Understands You
AI will adjust exposure difficulty and transformation methods based on your language map, ensuring you can both easily understand and gradually improve, creating 100x pressure-free Japanese exposure.
HowRies Works
Seamlessly supports your favorite websites and applications




















Transform English Webpages
Transform English Videos
Transform Japanese Videos
Transform Japanese Webpages

Hear WhatOthers Say
Real feedback is most valuable






Break language barriers, join the learning revolution

"Never thought browsing the web could teach me Japanese! Seeing Japanese words in English news felt strange at first, but now it feels incredibly natural with zero learning pressure..."

"Japanese always made me anxious - memorizing vocabulary was painful. This extension is completely different. It integrates Japanese into content I actually enjoy without rote memorization. With enough exposure, it just clicks!"

"It's just...really magical? Japanese words and phrases appear when I'm reading novels or browsing social media. At first I thought it was a bug, then realized this IS the learning method! I'm unconsciously increasing my Japanese exposure every day."

"I used to force myself to watch Japanese videos but couldn't stick with it. Now it's completely different - I learn Japanese vocabulary while watching English videos. I remember words without even trying!"

"As a programmer, Japanese documentation was such a headache. Ries changed my experience by gradually replacing familiar English content with Japanese. The progressive approach removed anxiety and dramatically increased my exposure."

"Doesn't feel like learning at all, yet my Japanese is improving. Recently I noticed I already know words in Japanese articles that I used to look up...all accumulated from daily exposure."

"Love that I don't need to deliberately study. Just normal web browsing, with AI occasionally replacing words with Japanese. By the end of the day, I've been exposed to so much Japanese with zero pressure."

"My child always resisted learning Japanese. Since using this, I discovered he's learning vocabulary while watching YouTube! No more forcing him to take classes - natural exposure means faster improvement."

"Traditional Japanese learning was painful! Ries doesn't require extra time - it transforms my regular web browsing to increase Japanese exposure. Perfect for lazy people like me, haha! Improvement without even noticing."
The Boundary Expansion Method by Ries Creator

My Boundary Expansion Method First Principles
- Whether you're viewing English or Japanese, studying or being entertained, you'll continuously be exposed to Japanese.
- We create comprehensible Japanese exposure at your language boundary, helping you continuously expand it.
- We control language exposure pressure, reducing the influx of too many new words, using continuous exposure instead of cramming, truly achieving steady progress.
What is Comprehensible Input?
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