Project LRNJ

This is the project page for the LeaRN Japanese RPG: Slime Forest Adventure.

SFA can teach you basic Japanese literacy with: katakana, hiragana, and kanji.

It is playable and the first storyline ("Jenk's Adventure", for introductory kanji recognition) is essentially complete. There are free and registered versions available for Windows, OS X, and Linux.

-Darrell Johnson
 (contact by email - all inquiries welcome)

Support development by becoming a member!

Talk to other Slime Forest players, get help with the game, get help with Japanese, meet new people.

New version: Build 165 (changelog)
Tuesday, November 25 2014
More updates coming soon!

Current Features

Free version of Slime Forest Adventure:

  • optional introduction to katakana and hiragana
  • get comfortable with kanji
  • learn to recognized and distinguish a thousand kanji
  • the adventure begins with Episodes 1-4
  • start learning kanji readings with a sample sidequest
  • introductory vocabulary and grammar in Supplementary Training

The Gradeschool Kanji registered version additionally has:

  • start learning to really read Japanese, by learning words written in kanji
  • full sidequest to train and test example words for kun readings
  • master seven powerful spells!
  • additional sidequests coming soon

The Common Use Kanji registered version also has:

  • the adventure is completed with Episodes 5-8
  • expanded set of nearly 2,000 kanji, enough for basic literacy
  • complete readings training through vocabulary, with ~3,000 example words
  • more sidequests coming soon

Slime Forest Adventure

Fight slimes, save a princess, learn Japanese!


Overworld Screenshot Battle Screenshot
Register a Project LRNJ Account Register for more:
$10 for Gradeschool Kanji version
$20 for Common Use Kanji version
(the Common Use Kanji version includes all of the Gradeschool Kanji version content)

Update Notifications

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Mini News

Tuesday, November 25

I've expanded the content of the "Demo" to include chapters 2-4 and teach kanji recognition for the gradeschool kanji.

Now it's a substantial game which gets you through one of the hardest parts of Japanese rather than a demo, so I'm just calling it the "Free Version" again.

I always wanted this much of the game to be free, so I'm happy to be able to do that. However, I still need your help to be able to continue improving the game. Please register or donate.

Saturday, November 15

Now you can make a member account on with no minimum payment. You just have to put some PayPal transaction through; the amount doesn't matter. The game price hasn't changed, though.

I've also made some changes with the new server, to make the site more secure. Member stuff is now SSL-only.

Reactivated the mailing list.

Sunday, November 6

Moved to a new server!

Monday, October 27

With today's release, Jenk's adventure continues in four additional episodes, so it tests the rest of the kanji recognition.

The main game is now complete in rough form, aside from lacking a proper ending. Now I'll be adding sidequests, polish, other characters' stories, and porting it to other platforms.