About

Momiji Study

Momiji (紅葉, autumn maple) is a study map for Japanese kanji. Instead of a flat list, every character sits in a graph of the characters it shares a radical or component with, the characters it shares a sound with, and the characters it shares a meaning group with. Each connection is labelled with why it exists, and every page carries readings, stroke order, and real vocabulary.

The guided five-minute session studies a few kanji at a time, checks them with recall questions, and schedules reviews with a small spaced-repetition model. Progress lives only in your browser — there are no accounts.

Data sources and licences

Momiji Study is built on open data. The relationship labels (radical, phonetic family, meaning group) are learning associations authored for this app; the underlying dictionary and stroke data come from the projects below, with thanks.

  • JMdict / EDICT

    Electronic Dictionary Research and Development Group (EDRDG) · Creative Commons Attribution-ShareAlike 4.0

    Vocabulary entries, readings and English glosses shown on every kanji page.

  • KanjiVG

    Ulrich Apel · Creative Commons Attribution-ShareAlike 3.0

    Stroke-order paths behind the stroke animation and the social-preview images.

  • kanji-data

    David Gouveia and contributors · MIT

    JLPT level, stroke count, radical and component data for the 2,211-kanji set.

  • Tatoeba

    The Tatoeba Project and its contributors · Creative Commons Attribution 2.0 France

    The 12,652 example sentences shown under vocabulary words, on the study card, and after a word question. Mandarin translations were converted to Traditional Chinese; the rest were translated for this project.

  • KANJIDIC

    Electronic Dictionary Research and Development Group (EDRDG) · Creative Commons Attribution-ShareAlike 4.0

    Newspaper frequency rank and Japanese school grade, shown on every kanji card and used to order the curriculum.

  • jlpt-word-list and open-anki-jlpt-decks

    elzup; jamsinclair and contributors · MIT

    JLPT vocabulary lists used to rank and label words by level.

Where a source is share-alike, the derived data files in this app are available under the same terms on request. JLPT is a trademark of the Japan Foundation and JEES; Momiji Study is not affiliated with them, and the level assignments come from community lists, not an official syllabus.

Contact

Momiji Study is made by Mikeneko Solutions. Corrections to a relationship label, a reading, or a licence note are welcome — reach us via the address on our organisation page, or open an issue on the project repository if you have access.