Sources and Licenses
Tadori Japanese is built on open Japanese-language data. Every source is listed here with its license. Where a source asks for particular wording, that wording appears below exactly as its authors asked for it.
Dictionary Data
JMdict - 30,136 entries, revision 2026-08-05
These files are the property of the Electronic Dictionary Research and Development Group, and are used in conformance with the Group's license. JMdict is made available under the Creative Commons Attribution-ShareAlike 4.0 International license.
Copyright in the underlying dictionary files is held by James William Breen and the Electronic Dictionary Research and Development Group. Kurouto Digital claims no copyright over that material.
Kanji, Readings and Example Sentences
KANJIDIC2
Kanji meanings, readings and stroke counts from the Electronic Dictionary Research and Development Group, packaged through kanji-data.
JMnedict
Proper names and whole-name readings from EDRDG and Jim Breen. Name contexts are labeled separately from ordinary vocabulary.
Tatoeba / Tanaka Corpus
Example sentences by Tatoeba contributors, supplied through tatoeba-json.
Community JLPT Lists
Study-level vocabulary and kanji lists by Jonathan Waller (tanos.co.uk), supplied through JLPT_Vocabulary and kanji-data. These are community study lists, rather than an official JLPT syllabus.
OpenJLPT Source Snapshots
Original Waller-list meaning snapshots used to distinguish selected homographs, by OpenJLPT contributors and Jonathan Waller.
The app selects, reformats and links these datasets for study. Some entries include original examples or explanations alongside licensed material. The in-app Sources and licenses screen records the versions used by the installed build.
Publisher References
Selected meaning distinctions and study-level placements cite Bunpro, NTT Internet, Nihongo Library, JLPT Sensei and JapanesePod101. These are factual study references. Their lessons, examples, images, transcripts and media are not reproduced.
Data-Packaging Software
- kanji-data, Copyright (c) 2019 David Gouveia
- JLPT_Vocabulary, Copyright (c) 2026 Bluskyo
- tatoeba-json, Copyright (c) 2024 mwhirls
These packaging projects use the MIT License; the underlying datasets retain their own licenses above. Their software notice follows.
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Typefaces
Set in Source Sans 3, with Zen Kaku Gothic New for Japanese display text. Both are licensed under the SIL Open Font License 1.1. Serving a webfont is redistribution, so the license travels with the file:
About the JLPT
JLPT and 日本語能力試験 are the names of the Japanese-Language Proficiency Test, administered by the Japan Foundation and Japan Educational Exchanges and Services. Tadori Japanese is an independent study app and is not affiliated with, endorsed by, or connected to either organization. Official information about the test is at jlpt.jp.
Written for Tadori Japanese
Original explanations, practice questions, reading passages and teaching structure are written for Tadori Japanese. Licensed dictionary entries, corpus sentences and other source material retain the credits and licenses listed above. We do not claim ownership of that material.