Added some additional Japanese terms

Added some Japanese terms that I know. Sources:

http://ja.wikipedia.org/wiki/%E6%84%9F%E5%98%86%E7%AC%A6
http://ja.wikipedia.org/wiki/%E7%96%91%E5%95%8F%E7%AC%A6
http://ja.wikipedia.org/wiki/%E5%BC%95%E7%94%A8%E7%AC%A6
http://ja.wikipedia.org/wiki/%E6%B3%A2%E3%83%80%E3%83%83%E3%82%B7%E3%83%A5