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Description
The ultimate Japanese immersion building tool for YouTube. NihongoTube is the ultimate extension for building Japanese immersion on YouTube. Distracting video recommendations, no more! With this extension all the recommended content you will see on YouTube will be in your target language Japanese. Highlights: 💪 Filtering for 10+ types of recommendations, content, comments, and pages. 🎚️ Filter videos by JLPT level to see only content at your level. 🗃️ JLPT estimates on every video, crowd-checked for accuracy. 🗾 100+ recommended channels on the home page to get you started. 👤 No more separate YouTube accounts needed for immersion. ⏰ Watch time statistics for immersion tracking. 📱 Mobile support for immersion on the go. 📝 Find videos with real Japanese subtitles, not auto-generated captions. 🙉 Automatically undo auto-dubbing. 🛑 Stop autoplay from pulling you into non-Japanese videos. ✅ One-click toggle to pause all filtering. ❤️ About NihongoTube is almost a year old, built with love by hardcore Japanese learners. This is the tool we wish we had on the way to N1 and beyond! 🔒 Privacy To build resilience against YouTube changes, JLPT estimates can be anonymously contributed to NihongoTube's servers. The data sent only contains video and JLPT estimate information. No personal data or browsing history is collected. You can opt-out anytime in settings. 💬 Discord Join the community, share videos, report bugs or request features. https://discord.com/invite/TVHH8e9UyQ 📱 Mobile Enjoy NihongoTube on mobile with any Chromium/Firefox based browser that supports extensions. Examples include: Microsoft Edge Canary, Quetta Browser, Firefox for Android, Orion for iOS. 📋 Changelog Version 6.5.0 (30/08/26) • Feature: added watch time tracking for unrated (JLPT N/A) Japanese videos, with a new N/A filter on the stats page. • Feature: added a START button to the JLPT box to record watch time for an unrated video you know is Japanese. • Feature: added a 'Show all videos' button to the 'no Japanese content' notice on channel pages. • Fix: JLPT badges now appear on channel page videos in the mobile app. • Fix: the 'No Japanese content available' notice no longer jumps around on channel pages. • Misc: new installs now show videos without subtitles by default (existing setups keep their filter). • Misc: removed the pop-in animation from the NihongoTube logo on YouTube. • Misc: 3 new recommended channels (N2×1, N4×2). Version 6.4.1 (10/08/26) • Fix: transcript and video title requests are now deduplicated (performance improvement). • Fix: JLPT estimation now happens in the background to keep page loading fast. • Fix: JLPT badges no longer flicker when changing pages. • Misc: 3 new recommended channels (N2×2, N3×1). Version 6.4.0 (23/07/26) • Feature: watch time rows can now be edited, including time, date & JLPT level (thanks to LeggoSF on Discord). • Feature: click a heatmap day to filter your watched videos. • Feature: recommended channels can now be filtered by tag. • Feature: JLPT difficulty box added to mobile watch pages. • Feature: new JLPT box metrics including word count, character count & line density (thanks to Vicky for the suggestion). • Fix: watch time tracking no longer stops until the page is refreshed (mobile). • Fix: video duration in watch page stats on mobile. • Misc: refreshed recommended channel tags, names & descriptions. • Misc: added hover feedback to recommended channel cards. • Misc: 2 new recommended channels (N1×1, N4×1). Version 6.3.1 (13/07/26) • Feature: added dismiss button to recommendation shelf • Misc: improved pop-up experience Version 6.3.0 (26/06/26) • Feature: light mode added! • Fix: day reset now also applies to weekly & heatmap stats • Fix: hiding JLPT badges now keeps filters & watch stats on • Fix: no more white flash when opening extension pages in dark mode • Misc: added links between settings and the watch time stats page • Misc: 2 new recommended channels (N2×1, N5×1). Version 6.2.0 (13/06/26) • Feature: new settings setup wizard added to get the most out of NihongoTube • Feature: added option to hide videos with auto-generated subs (thanks to Ariac & Vicky on Discord) • Feature: 4 new recommended channels added (N2×2, N3×2). • Feature: new privacy setting: opt out of having your JLPT level ratings shared anonymously on our Discord Version 6.1.0 (08/06/26) • Feature: Crowdsourced JLPT level displayed on video JLPT badge Version 6.0.1 (05/06/26) • Feature: 1 new JLPT N5 recommended channel added. • Fix: reveal comments button missing on notification navigation • Misc: detected accounts live-update in settings without a page refresh • Misc: removed tabs permission to improve privacy Version 6.0.0 (25/05/26) • Feature: JLPT level filter added! • Feature: filter out videos without transcripts. • Feature: watch time day reset now configurable (thanks to Blue on Discord). • Fix: filtering and JLPT badge mounting on mobile. • Misc: 14+ new recommended channels (N1×10, N2×1, N4×2, N5×1). Version 5.5.0 (07/05/26) • Feature: added YouTube account level master switch toggle (thanks to 'Aurora Wright' on Discord). • Fix: 'Auto-dubbed' badges are unhidden when the extension is toggled off. • Fix: JLPT badge styling and spacing improvements. • Misc: JLPT is now always ordered N5 to N1 in the UI. Version 5.4.0 (30/04/26) • Feature: JLPT video box with WPM & vocab distribution data. • Fix: 'Auto-dubbed' badges automatically hidden again. • Misc: links in the popup can now be opened via middle-click. • Misc: improved lightmode support for the welcome page. Version 5.3.1 (26/04/26) • Fix: style fixes for JLPT features and recommendation shelf Version 5.3.0 (23/04/26) • Feature: watch time in the extension tray icon! • Fix: clearing browser cache no longer breaks settings (thanks to 浪漫中金 on Discord). • Fix: watch time correctly handles different playback speeds. • Misc: new dedicated settings page to support more settings in future. • Misc: watch time stats page now shows video duration in video thumbnails. Version 5.2.0 (15/04/26) • Feature: 5 new recommended channels added. • Feature: Russian system UI localisation added. • Feature: JLPT levels in watch time statistics can now be modified by hand. • Feature: new welcome page. • Fix: JLPT level badges now look normal again. Version 5.1.1 (08/04/26) • Fix: sidebar filtering and JLPT badges following a YouTube update. Version 5.1.0 (05/04/26) • Feature: added mobile support across Chromium browsers! • Fix: watch time metrics working and improved on mobile. • Fix: JLPT badges on mobile now have a background again. Version 5.0.1 (03/04/26) • Misc: boosted general performance by 150%. Version 5.0.0 (29/03/26) • Feature: watch time metrics for immersion tracking! • Fix: improved alignment of JLPT level badge on side videos. Version 4.12.1 (19/03/26) • Feature: submit JLPT level feedback on any video! Version 4.11.2 (11/03/26) • Fix: home & sub page alignment following a YouTube update. Version 4.11.1 (05/03/26) • Fix: JLPT estimation following a YouTube update. Version 4.11.0 (20/02/26) • Feature: added 10+ new recommended channels. • Fix: JLPT level estimation improvements. Version 4.10.2 (15/02/26) • Fix: channel data retrieval fixed. Version 4.10.1 (29/01/26) • Fix: JLPT estimation following a YouTube update. • Fix: improved first install & update handling for already open YouTube tabs. Version 4.10.0 (12/01/26) • Feature(desktop): automatic native Japanese audio track selection - no more dubs! • Fix: borders on recommended channels are back! Version 4.9.2 (04/01/26) • Feature: channel whitelist to bypass filtering! • Fix: resized mobile settings popup to improve usability. • Fix: potential infinite loop (freeze) on channel pages. • Fix: filtering for new channel page featured video format. Version 4.8.1 (31/12/25) • Feature: JLPT estimates on channel pages! • Fix: performance improvements (reducing network calls). • Fix: corrected channel link in recommended channels. Version 4.7.0 (26/12/25) • Feature: subtitle information available on recommended channels. • Feature: JLPT estimates now backed up via anonymous crowdsourcing to protect against future YouTube changes (opt-out in settings). Version 4.6.0 (19/12/25) • Feature: JLPT estimate badges can now be toggled on/off in settings. • Fix: JLPT estimates are now working again (transcript download issue)! Version 4.5.4 (24/11/25) • Feature: recommended channels can now be filtered by JLPT level. • Feature: 30+ new recommended channels added. • Fix: network error handling improvements for JLPT level estimates. • Fix: further JLPT level estimate tuning (focus on political content). • Fix: rare freeze related to window size changes on video pages. • Fix: explicitly excluded studio.youtube.com from filtering. Version 4.4.0 (20/11/25) • Feature: toggleable setting to distinguish auto-generated subtitles. • Feature: added update notification to inform users of changes. • Fix: added tabs to the popup to better organise settings. Version 4.3.3 (15/11/25) • Feature: added system UI support for Hindi. • Fix: resolved issue with video preview playback on home/subs pages. • Fix: potential freeze on channel navigation. • Fix: empty video shelf notification is now more reliable. Version 4.2.3 (13/11/25) • Feature: system icon now toggles based on master switch state. • Feature: 5 new recommended channels. • Fix: expanded word dataset to improve level estimate accuracy. • Fix: JLPT level estimate tuning for N5 (repetition & short video weighting). • Fix: guard against the comment reveal button duplicating. • Fix: channel filtering improvements during navigation. • Fix: metric saving now works again. Version 4.1.0 (09/11/25) • Feature: mobile support on Firefox for Android! • Fix: added an indicator when JLPT level is unavailable. • Fix: tweaking for JLPT level estimates in the N3-N5 bracket. • Fix: filtering for movie and new short format in video side bar. • Fix: subscription page filtering toggle working again. • Fix: bug in channel filtering (via navigation) resolved. • Fix: issue with JLPT level UI duplicating on videos. Version 3.0.1 (05/11/25) • Support for localized store listings. Version 3.0.0 (05/11/25) • Feature: system UI language support for Chinese & Japanese added! • Feature: filtering now stops end-of-video auto-navigation if the target video is not Japanese. • Fix: search result JLPT level is correctly readded after back navigation. • Fix: improved speed for untranslation layer by 6x. Version 2.0.0 (04/11/25) • Feature: JLPT level on the home & subscription page! • Fix: tweaks to improve JLPT level estimate accuracy. • Fix: untranslate video titles to improve filtering accuracy. • Fix: caching improvements to improve performance over long sessions. Version 1.10.0 (31/10/25) • Feature: JLPT level on video sidebar recommendations! • Feature: added a link to our Discord to the settings popup. • Fix: JLPT level accuracy improvements. • Fix: settings toggle behaviour improvements. Version 1.9.2 (30/10/25) • Feature: filtering applied to auto-generated channels! • Fix: endscreen filtering following a YouTube update. • Fix: handle filtering false-positive with fypシ hashtag. • This release also includes an extensive rewrite to enable more cool features to come. Version 1.8.1 (26/10/25) • Feature: added a refresh button to channel recommendations. • Fix: removed 'open settings' button from explore notification. • Fix: fixed channel video filtering following changes in v1.7.0. • Fix: various extension performance and error handling improvements. Version 1.7.0 (25/10/25) • Feature: button added to reveal hidden search results. • Feature: added an on-install welcome page. • Fix: page load times improved by 2.5x! • Fix: playlists are now filtered on the search page. • Fix: empty content shelves are now filtered on the search page. • Fix: resolved edgecase in Japanese language detection involving kaomoji. Version 1.6.0 (21/10/25) • Feature: added filtering for search results! • Fix: more JLPT level estimation tuning. • Fix: performance improvements. Version 1.5.0 (19/10/25) • Feature: JLPT level estimates on search results. • Feature: 4 new recommended channels added. • Feature: Ko-fi support button added. • Fix: JLPT level estimation tuning for music. • Fix: JLPT level estimate now correctly appears on Firefox. Version 1.4.4 (14/10/25) • Fix: 'reveal comment' button now uses correct highlight colour in light-mode. Version 1.4.3 (13/10/25) • Feature: added a 'reveal comments' button to show filtered comments. • Fix: addressed a known warning associated with loading video transcripts. • Fix: reload handling improvements. Version 1.3.1 (11/10/25) • Fix: corrected menu colours on firefox. Version 1.3.0 (09/10/25) • Feature: videos now display an estimated JLPT level. Version 1.2.5 (04/10/25) • Feature: added 3 new recommended channels. • Fix: improved how filtering deactivates on page navigation. Version 1.2.4 (28/09/25) • Fix: alignment of videos on the home & subscription page. Version 1.1.2 (22/09/25) • Fix: subscription page filtering following a YouTube update. Version 1.1.1 (28/08/25) • Fix: home and related page filtering following a YouTube update. Version 1.1.0 (25/08/25) • Feature: added recommended Japanese channels to home page. • Feature: added channel home & shorts page filtering. • Fix: addressed false positive with '#fypシ゚'. • Fix: empty shorts containers are now properly hidden. • Fix: no content notification on channel video section now hides after toggle off. • Fix: navigating backwards to a channel now reapplies filtering.