tiny-segmenter

Super compact Japanese tokenizer in Javascript. http://chasen.org/~taku/software/TinySegmenter/

kuroshiro

kuroshiro is a Japanese language library for converting Japanese sentence to Hiragana, Katakana or Romaji with furigana and okurigana modes supported.

react-composition-input

An input component optimized for languages which need composition such as Chinese, Japanese etc.