HeyJapan - Japanese learning app with all skills: vocabulary, grammar, kanji, listening and speaking You can learn Japanese from the alphabet (Hiragana, Katakana, Romanji) to N4 within 3 months. The application will focus on regular practice with Japanese conversation lessons interspersed with JLPT exam preparation grammar structures. Therefore, whether you are learning to communicate or preparing for a Japanese proficiency test, try our app!