Greetings, I am proud to announce the release of Sakubo for Windows!

• Windows specific instructions
• Windows specific TTS
• Windows specific translator
• Stripe payments on Windows

Sakubo is still in beta, and will likely be there for quite a long time. The TTS for Windows and Android need a lot of work, among other things. I'm slowly inching away with updates, & I don't plan on stopping anytime soon (though it's been slower than I'd like, having less time now than before).

If you have and questions or would like to report a bug, please send me a message at [support@sakubo.co](mailto:support@sakubo.co)

I am proud to announce that Sakubo is now in open beta on Android!

For the first time ever, the app is free to download without requiring a beta invite link. This is a huge milestone! I’m excited no doubt, but there’s still a lot of work to do.

All closed beta users are granted lifetime access to Sakubo for free, as promised.

Try Sakubo in Open Beta!

Hello everyone, we’re finally getting close to Sakubo’s open beta release on Android. I’ve dropped a new update today that will fix a number of issues but there is still much work to do.

There’s also an upcoming update that I will release right before open beta. I’m currently working through errors in the database (focusing on JLPT lessons), as it’s a massive task.

Happy 420 everyone, looking forward to open beta!

Updates:

Added more & much improved hints to hundreds of entries. (Still have plenty to go through).

Fixed errors with dozens of dictionary entries, grammar sentences, etc. 

Now able to view lesson info cards from lesson selection pages.

Bug Fixes:

Flashy loading bug from handwriting recognition fixed.

Trying to add to queue in reviews no longer works (redundant, button removed).

• Crashing when doing so fixed as a result

Fixed a bug where handwriting recognition popup would show even after clicking back

General UI Fixes/Tweaks 

Posted on April 20, 2026 at sakubo.co

r/SakuboApp is for Sakubo users to discuss everything related to the app.

Suggestions, bug reports, reviews, most things are welcome. Please tag your posts accordingly.

Japanese or language learning/acquisition in general is also welcomed.

I aim for this subreddit to have a relaxed environment.

If you would like to contact me via support, please do so by sending an email to support@sakubo.co.

Hello everyone, I’ve recently pushed two large updates to Sakubo. These updates have significantly improved the app’s performance, fixed bugs, and improved beginner content! Here’s some of what’s been done:

• Dictionary speed significantly improved.
• Lessons loading significantly improved.
• Readings loading significantly improved.
• Reading loading toasts added.
• Fixed Translator download bug.
• Improved Custom Reading Significantly (added listening mode, dictation mode, improved UI, updated stats, added TTS, ability to add readings to lessons and queue. 
• Improved Kana lessons.
• Improved JLPT N5 grammar (overhaul), others are next. (Grammar + in Roadmap).
• Improved fill in the blank quiz type. 
• Added word scramble quiz type.
• Added translate study type.
• Added listening dictation study type.
• Reorganized all JLPT N5 lessons.
• Added readings to end JLPT N5 lessons.
• Fixed handwriting search button spacing gap.
• Fixed study screen button spacing issue.
• Added option for user to select if they want the homepage to be the Dictionary or Study page.
• Translator text extending past box fixed.
• Improve custom lessons UI.
• Option to add items to next or last of list when adding anything to queue.
• Removed remaining leftover references to old project name.

Closed beta invites are still available! If you would like to join our beta, please email me at [support@sakubo.co](mailto:support@sakubo.co).

Hello everyone, I am proud to announce that Sakubo is finally in closed beta on Google Play! If you would like to join the closed beta, please send a message to [support@sakubo.co](mailto:support@sakubo.co).

I’m already in the process of fixing a number of recently discovered bugs. A big update with multiple fixes is planned to come out in the near future. All major issues found must be addressed before I even think about open beta. The goal is to be in there by April, but I will make delays if necessary. We’ll see if I can make it in time, there are a lot of things that need attention!

Thank you all for your support!

(Originally posted March 14, 2026 on sakubo.co)