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Kanji Renshuu 1.0 – Released !

After 2.5 months of development, today, Kanji Renshuu 1.0 is finally released and available for download on Google Play. Kanji Renshuu (漢字練習) is a flashcard application to help you practice Japanese Kanji characters. A simple Spaced Repetition System (SRS) is adopted to schedule and organize your Kanji practice.

Flashcard System

Flashcard is a widely used tool to aid memorization. The system works by presenting you with a series of Q/A cards with questions facing front and the answers hidden in the back-side. For each questions, you will need  to guess or memorize the answer, flip the card to see the actual answer, and provide a performance feedback to the system.

Kanji Renshuu as a flashcard application will present you with a series of English keywords in the front-side of the cards. Your job will be to memorize the associated Kanji characters and provide a performance feedback to the system: correct, wrong, or not sure. The system will act accordingly depending on your response. For example, a correct response will promote a card to a higher level and its review schedule interval will be extended. Please note that in order to take full advantage of SRS, an honest feedback is essential.

The system allows you to reverse the question and answer: given a series of Kanji characters, your job will be to memorize the associated English meanings. However, as suggested in the book Remembering the Kanji by James W. Heisig, the recommended way of practice is to map from English keyword to Kanji characters, as the reverse will be taken care automatically.

Kanji Renshuu flashcard: Front and back side,

Kanji Renshuu’s flashcard: front and back side.

Spaced Repetition System

A psychological spacing effect is a phenomenon whereby people can remember facts better if studied a few times spaced over a relatively long time span compared to cramming: repetitive study over a shorter period of time. Kanji Renshuu adopts a simple Spaced Repetition System (SRS)  to exploit this psychological effect and better aid you in memorization.

Kanji cards are labeled with 5 different color gradations, from red to lime green. This color label indicates the difficulty level of a particular card according to your personal practice performance. If you can correctly memorize a Kanji during practice and a certain condition has been met, the card will be promoted to a higher level closer to lime green. Otherwise, it will be demoted all the way down to level red for your own good. The system will adjust card review schedule interval according to this level. Basically, lower level cards will be reviewed more often and vice versa.

In any given day, the system will provide you with the number of cards that are due for review on that day, e.g. “50 cards to review today”. Ideally, you will want to practice these cards and have this daily counter set to zero. Otherwise, all remaining cards will simply be rescheduled for review on the next day.


Kanji Renshuu’s dashboard and progress chart.

Kanji Database

There are 3007 most frequently used Kanji characters registered in Kanji Renshuu database, each are indexed and given an English keyword according to the book Remembering the Kanji by James W. Heisig. The Kanji order in this book is designed to introduce new characters efficiently by building upon the primitives and characters already learned before. If you choose to study by any other order, the system allows you to sort Kanji cards according to Jōyō grade and JLPT level estimation. A search function is provided to search individual Kanji by English meanings, Kanji character, or on/kun readings.


Kanji Renshuu’s card selection and card detail page.

Why another flashcard app?

Kanji Renshuu was initially developed because I’m not satisfied with existing flashcard applications available on Google Play. AnkiDroid has a great SRS implementation, but it’s not straightforward to make a granular card selection. JFCards has a simple and intuitive interface, but no built-in SRS. At the end, I feel the urge to develop one that suits better with my learning style, and thus the app was born.

Kanji Renshuu is just a yet another alternative for you to consider. Pick one that fits the best with your learning style. Good luck on your Kanji-learning journey. Hopefully Kanji Renshuu can be of any help to you 😉

P.S. If you like the app, please consider buying the ad-free license.


Written by Andree

February 13, 2013 at 3:44 pm

Posted in Android, Japanese, Software

Tagged with , ,

2 Responses

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  1. I just bought the license 🙂 so happy that you get what we want and need in a Japanese studying app


    February 21, 2013 at 10:08 am

    • Thanks a lot for purchasing the license. Wish you the best for your study!


      February 22, 2013 at 8:13 pm

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