NihonTools uses open Japanese dictionary, vocabulary, example sentence, and stroke-order
resources. Sentence links retain contributor attribution.
KANJIDIC2 and
JMdict are the property of the
Electronic Dictionary Research and Development Group (EDRDG), used in accordance with its
license.
Converted data by jmdict-simplified.
Dictionary data is licensed under
CC BY-SA 4.0.
OpenJLPT contributors provide vocabulary,
readings, romanization, and modern JLPT estimates, derived from EDRDG and
Jonathan Waller's JLPT lists (CC BY).
OpenJLPT data is CC BY-SA 4.0. Modern N5–N1 levels are unofficial estimates;
the pre-2010 JLPT levels in KANJIDIC2 are preserved separately.
Example sentences by Tatoeba contributors
(including the Tanaka Corpus), licensed under
CC BY 2.0 FR.
Sentence links identify their original records and contributors.
Traditional radical data by Kanji alive,
CC BY 4.0; normalized and regrouped for the radicals cheatsheet.
Stroke-order SVGs by Ulrich Apel and
KanjiVG contributors,
CC BY-SA 3.0.
Original SVGs, including their notices, are preserved unchanged.
Worksheet stroke models adapt KanjiVG paths and stroke-number positions with adjustable colors and sizes.
The Kanji Stroke Orders font by Ulrich Apel,
the AAAA project and the Wadoku project is used as a fallback.
Font license and disclaimer.
SKIP codes are copyright Jack Halpern and the Kanji Dictionary Publishing Society,
distributed under CC BY-SA 4.0 as part of KANJIDIC2.
Japanese word-boundary data includes MeCab IPADIC, copyright 2000–2003
Nara Institute of Science and Technology, with ICOT conditions.
Dictionary notices
and software license.
Category membership can overlap. Kokuji is recorded only when
explicitly marked by KANJIDIC2; an absent marker means unknown, not proof of non-membership.
Missing levels and readings are not invented.
Shiritori uses the local JMdict dictionary first and may send an unknown
word to Jisho for an exact-match fallback
(EDRDG dictionary attribution applies). Its thematic categories use
approximate English-gloss filters, not a curated taxonomy. Kana input
conversion uses WanaKana (MIT).