MeCab is open source Japanese dependency structure analyzer developed
through the joint research project between Graduate School of Informatics
Kyoto University and NTT (Nippon Telegraph and Telephone)
Communication Science Laboratories. It has following features:

* General-purpose design independent from language, dictionary and
  corpus.
* High precision of analysis based on Conditional Random Fields.
* Faster than ChaSen, Juman and KAKASI.
* Library is reentrant.
* Scripting language bindings such as Perl/Ruby/Python/Java/C#.

WWW: https://code.google.com/p/mecab/