Category Methods for working with Japanese strings such as:
-converting between Romanji, Hiragana , Katakana and Kanji
-replacing Kanji with Hiragana
-identifying the kind of Japanese text contained in the a string (based on unicode ranges)
-phoneitic comparison (very simple) of strings; useful for comparing the phonetic similarity of words
Brief example write up at : http://00steveng.github.io/NSString-Japanese