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Learn to read & write Japanese with mnemonics even if you have little spare time

Mnemonics are a very powerful brain hack to study Japanese on your own. They allow you to memorize even the most complex jōyō kanji & vocabulary faster than any flashcard app. You will review your learned kanji with one of the best spaced repetition systems out there and Kanji Book will help you achieve that in 3 easy steps.
Soil radical
Mouth radical
Walk radical
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First you define a personal learning goal. Be it an upcoming Japanese vocabulary test or a bigger challenge like one of the Japanese language proficiency tests. We got you covered.

Feather radicals
White radical
Click me Tap me


Next, it’s time to study your kanji and vocabulary. You can either create your personal and interactive mnemonics or you can select one of the most successful mnemonics our platform has to offer.

Gate radical
Put together
Click me Tap me


Then comes the review part. Here you will see how good your mnemonics are, or those of others. Kanji Book creates reviews based on your previous success rates and times them just perfect using spaced repetition so that you can have the best results.

No credit card required.

Track your performance with easy to read statistics

Getting better at something requires to keep track of your performance. You’ll get easy to read statistics which will give you instantaneous feedback on how well you’re doing.

See what’s coming up

Knowing the past is helpful, knowing the future is even better. Everyone is busy nowadays, and planning ahead gets more and more important. You’ll see at a glance how much work awaits you in the next 30 days with our review prognostics.

Inspect kanji

Kanji Book orders your learn goals based on its dependencies. A kanji often has other kanji included and its easier to learn them if your know the constituents beforehand. You can inspect a kanji by simply clicking on the letter in the goal overview.

Use your acquired knowledge

After numerous studies sessions, who doesn’t want to put what has just been learned into practice. Most people like to consume Japanese media. With the Neko player you can simultaneously enjoy the content and connect your study progress from Kanji Book. Learn more »

Initially, I started to learn Japanese to make me understand my favorite Anime without English subtitles. In May 2017, I visited Japan on my own and that’s when I got hooked on the whole culture. Then, I ditched university to create this site where I do everything on my own. Check it out and tell me what sucks!

Martin Schleiss,
Kanji Book

How it works

Whether you study for an upcoming test or see it as a life mission to memorize all 2136 jōyō kanji, you will run into the problem of memorizing them. To learn them you have to have a plan and the right tools. Kanji Book will assist you in your kanji studies.


Our method involves the use of mnemonics. They are small tales which help the memorization of abstract concepts by connecting them to already known facts.

For instance, in school you might have encounterd a sentence like “ My very educated mother just served us nachos” to remember the order of the planets in the solar system. Here, each initial letter represents the name of a planet, namely Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune.

Kanji & Vocabulary

If you look at a Japanese dictionary, you will notice that words consist of mostly 2 or more kanji. Japanese is a compound heavy language where it’s rare that a word consists of a single kanji. Therefore it does not suffice to learn kanji by themselves but to learn the words too.

To make matters worse, the pronunciation of a kanji can vary depending on its position in a word. Therefore we have to come up with a strategy to remember them. Mnemonics can help here.

An example

If you wanted to learn the word 保護者 (guardian) which you would need to know for the JLPT N1 test, Kanji Book would instruct you to learn each kanji first. The most complex kanji 護 has 20 strokes.


It looks intimidating if you wanted to learn it without a strategy and purely by rote memorization. Kanji Book will instruct you to learn the following constituents first:


Now, if you wanted to come up with a mnemonic, it would be really easy. Here is an example:

A bird is walking on the grass back and forth, again and again. It seems to protect a statue with the kanji on it. He seems to be the guardian of the statue.

Kanji Book will order the kanji automically for you. All you have to do is select a set to learn, come up or select an existing mnemonic and do your reviews regulary.