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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
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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
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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 kanji. 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.

Radicals & Kanji

Radicals are the building blocks of a kanji. A kanji can consist of 1, 2, 3 or more radicals. Each radical consists of several strokes. As you can see, to encode as many meanings in a script you have to use more radicals which means there will be even more strokes involed. Unfortunately, the human brain isn’t made to remember complex structures efficently if there is no meaning associated to them. Hence we use mnemonics to associate a meaning to a kanji’s building blocks.

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 as well.