Everything you need for Japanese immersion
From comprehensive filtering to JLPT level estimation, NihongoTube provides all the tools you need to transform YouTube into your personal Japanese learning platform.
Powerful Features in Detail
Deep dive into the capabilities that make NihongoTube essential for Japanese learners.
JLPT Level Estimation
NihongoTube analyzes video transcripts to estimate difficulty levels from N5 to N1 based on vocabulary, grammar patterns, and speech rate. Find content that matches your proficiency level with ease.
- Difficulty estimates from N5 to N1
- Based on vocabulary and grammar analysis
- Displayed as badges on videos
- Helps you find appropriate content
Complete YouTube Filtering
Filter non-Japanese content across the entire YouTube platform. From the homepage to video recommendations, comments to search results—NihongoTube creates a fully immersive Japanese environment.
- Homepage and video page filtering
- Sidebar recommendations filtered
- Comment section filtering
- Search results filtering
Customizable Experience
Tailor NihongoTube to your needs with extensive customization options. Toggle specific filters, manage channel whitelists, control JLPT badges, and adjust settings to match your learning style.
- Toggle individual filters on/off
- Channel whitelist for exceptions
- Master toggle for quick disable
- JLPT badge visibility control
Additional Features
More tools to enhance your Japanese immersion experience.
Recommended Channels
Curated Japanese channels displayed on your homepage. Filter by JLPT level and see subtitle availability.
Auto-Dubbing Prevention
Automatically selects native Japanese audio tracks—no more dubs!
Channel Whitelist
Bypass filtering for your favorite channels that post mixed content.
Mobile Support
Full featured extension available on Firefox for Android. Immerse on the go!
Filtering
Comprehensive filtering across YouTube
Homepage Filtering
All video recommendations on your YouTube homepage are filtered to show only Japanese content. Start your immersion journey right from the moment you open YouTube.
Sidebar Recommendations
Video recommendations in the sidebar are filtered in real-time. Stay immersed while watching videos without distracting English content suggestions.
Comment Filtering
Non-Japanese comments are hidden to maintain full immersion. A reveal button lets you view hidden comments when needed without breaking your flow.
Search Results
Search results are filtered to Japanese content. Find what you're looking for while maintaining your immersive learning environment.
Shorts & Gaming
Shorts recommendations, gaming explore page, and subscription feeds are filtered. Note: The shorts feed itself (when scrolling through shorts) is not filtered yet, only shorts recommendations on other pages.
Video Endscreens
Recommendations shown in video endscreens are filtered. No surprise English videos when your Japanese content ends.
Learning Tools
Features designed for language learners
JLPT Level Estimation
Videos are analyzed and assigned difficulty levels from N5 to N1 based on vocabulary, grammar, and speech rate. Find content that matches your proficiency.
Recommended Channels
Curated list of quality Japanese channels suitable for different levels. Filter recommendations by JLPT level and see which have subtitles available.
Filtering Metrics
Track how much content is being filtered. See statistics about your immersion journey and understand the extension's impact.
Location Recommendations
Get notified if changing your YouTube location to Japan could improve your recommendations. More localized Japanese content suggestions.
Customization
Tailor the experience to your needs
Master Toggle
Instantly enable or disable all filtering with a single toggle. Perfect for when you need to temporarily view non-Japanese content.
Channel Whitelist
Add specific channels to a whitelist to bypass filtering. Useful for channels that post mixed Japanese and English content.
Granular Controls
Toggle individual filters on or off. Control comment filtering, JLPT badge display, and more through an intuitive settings interface.
Reveal Buttons
Hidden content can be revealed with dedicated buttons. View filtered comments or search results without disabling filters entirely.
Platform Support
Available across browsers and devices
Chrome & Chromium
Full support for Chrome, Edge, Brave, Opera, and other Chromium-based browsers. Seamless integration with the Chrome Web Store.
Firefox Desktop
Complete feature set available on Firefox desktop. Download from Firefox Add-ons with automatic updates.
Firefox for Android
Full mobile support on Firefox for Android. Enjoy Japanese immersion on the go with all core features available on your phone.
Dark & Light Mode
Automatic theme support that matches your YouTube settings. Seamless visual integration with both dark and light modes.
Multi-Language UI
Interface available in English, Japanese, Chinese, and Hindi. The extension adapts to your browser's language settings.
Auto-Dubbing Prevention
Automatically selects native Japanese audio tracks when available. No more accidentally watching dubbed versions of Japanese content.
Ready to accelerate your Japanese learning?
Install NihongoTube today and transform YouTube into your immersive Japanese learning environment. Completely free!
