http://www.lavasoftware.com/ls/ksfeatures.html

Kanji Safari is a fun and addictive Kana and Kanji learning game for up to 4 players. It can be used by students just starting Japanese who need to learn Hiragana and Katakana (the Japanese phonetic alphabets), up to more advanced students who already know a range of Kanji characters (the more complex characters derived from Chinese).