Jotoba is a multilingual Japanese dictionary. It is easy to find translations for words or kanji, see example sentences and the way names can be written.

Jotoba is open source. Check out our Github page if you want to contribute or host Jotoba yourself.
Check out our Trello Board aswell if you are interested in upcoming features and what we are currently working on!

Data Sources and Inspiration

Of course this project wouldn't have been possible without the help of some great data sources.
Many thanks to every one of them for providing such a variety of data people can use to learn the japanese language.


Joto-kun was created by a good friend of ours who is truly a wizard when it comes down to design!


Jisho, created by Kim Ahlström, Miwa Ahlström and Andrew Plummer is a pretty and powerful english-japanese dictionary.
We took inspiration in their work and design to improve on their concept and offer it to a wider variety of people.

Words & Kanji & Names

Words (except sound effects), Kanji and Names available on this site are publicly provided and maintained by
EDRDG (Electronic Dictionary Research and Development Group) and available under the license
Creative Commons Attribution-ShareAlike Licence (V3.0).
Additionally, the RADKFILE by Jin Breen is used to link Radicals to Kanji.

Audio Files #1 and Audio Files #2

The audio files #1 were graciously made public by WaniKani & Tofugo and uploaded to Github under the CC-BY-4.0 licence.
The audio files #2 are provided by the Kanji alive project and are also available under the CC-BY-4.0 license.

Manga Sound Effects

The data about Sound Effects is graciously provided by Chris Kincaid and is used as additional data in the word search.


Sentences are provided by Tatoeba under the Creative Commons CC 1.0 and 2.0 licences.

Kanji Animations

The raw data used for kanji animations is publicly provided by KanjiVG, a project by Ulrich Apel.
The conversion into images and animated SVG is done by a ruby script which was made by Kimtaro and altered by Yukáru.


Data about JLPT proficiencies are by provided by Jonathan Waller.
There is also some non-free data available on his website, so check it out if you are interested.

Word tokenization

Word tokenization is done using a project from Hideki Yamane and used for Japanese morphological analysis implementations.


Data about Radicals used in specific Kanji are provided by Kanjium.
On the project's Github Page you can find lots of data about Kanji.

Pitch accents

Pitch accent data has been extracted from UniDic.