Credits & licenses
Dopa Kanji is a free, non-commercial kanji game by Learn Japanese with Yuya. It is an unofficial fan project built on Dopa Drill (ドパドリル).
Dopa Drill and Dopakichi
Game engine, sound, effects and design come from Dopa Drill by gear_machine (MIT License).
The character Dopakichi (ドパキチ) © gear_machine is used with permission. Dopakichi and the Dopa Drill name and logo are not covered by the MIT License.
Kanji data
KANJIDIC2 (readings, radicals, stroke counts) © Electronic Dictionary Research and Development Group, CC BY-SA 4.0.
KanjiVG (stroke order) © Ulrich Apel, CC BY-SA 3.0 — kanjivg.tagaini.net.
JLPT levels: there has been no official JLPT kanji list since 2010. Levels follow the unofficial JLPT kanji lists of mojidic.com (a guide only).
JMdict (N4–N1 example words and meanings) © EDRDG, CC BY-SA 4.0; JmdictFurigana (furigana) by Doublevil, CC BY-SA 4.0; open-anki-jlpt-decks (JLPT vocabulary lists) by jamsinclair, MIT.
N5 example words and meanings were chosen and written for this game; N4–N1 were selected automatically from the sources above. The kanji data files in data/ are shared under CC BY-SA 4.0.
Voice
Readings are generated with Irodori-TTS by Aratako (MIT). The voice is an original voice designed from a text description — it is not anyone's real voice. The audio carries an inaudible AI watermark. Where no clip exists, your device's Japanese voice is used.
Fonts
Dela Gothic One, Zen Maru Gothic, Klee One — SIL Open Font License 1.1 (see fonts/OFL-*.txt).
Privacy
Your progress is saved only in this browser (localStorage). Nothing is sent to a server. No ads, no tracking, no purchases — coins come only from playing.
Found a wrong reading or a typo? Please tell Yuya.