Kotoba Forest turns Japanese vocabulary study into a forest-building game. Start with a 20-question diagnostic, choose a JLPT N5–N1 goal, then plant and water words with spaced repetition. Learn 10,000 words with native audio, example sentences, mock tests, weakness drills, and animal mini-games. Available on iOS and Android with interfaces in English, Traditional and Simplified Chinese, Korean, Thai, Vietnamese, and Indonesian.
