Friday, August 21, 2026

(Free) Tools for learning Japanese

Recently, I build my own tools to learn Japanese, focusing on how to be able to read Kanji with minimum effort (without writing practice). These tools are listed below:

  1. Kanji-drill: a tool to mimic how Japanese elementary school students learn kanji
  2. Kotoba: learning words in context since language is a collection of words
  3. JLPT: a tool to learn kanji and compound words for JLPT
  4. Wani Kanji: Free tool to mimic wanikani
  5. JED: Japanese-English dictionary with radical, kanji, word, and sentence examples.
Although these apps are intended to be the most effective way to be able to read Kanji without writing, still, manual writing has the biggest impact on learning Kanji. These tools are all free, and currently there is no plan to commercialize them. Feel free to use it and contribute to the development in my GitHub repos. Get the repo at https://github.com/bagustris/<tool-name>.

Since I am also doing research on speech AI, I plan to build AI models to help learning Japanese, e.g., building AI models to detect correctness of pronunciation, vowel devoicing, double consonants, and long vowels in Japanese language learning. One prototype model that can be tried for vowel devoicing is one created by my student hosted on the following Hugging Face space: https://huggingface.co/spaces/Rudy-Ong/ja_vowel_devoicing_detection