In learning the Japanese language, kanji idiom learning is as important as kanji (Chinese characters) learning. A kanji idiom intelligent computer assisted instructional (ICAI) system called JUGAME was developed. It can handle approximately 3,000 kanji idioms and has a puzzle game environment within a learning environment using Open Software Foundation (OSF)/Motif graphic user interface. In this environment, it is the goal of the game for students to find all kanji idioms hidden in the puzzle by combining puzzle elements (kanji). Although it is generally said to be difficult for foreigners to learn kanji idioms, they can be learned through playing the puzzle game without loss of learner motivation. Moreover, JUGAME does not prepare the puzzle patterns in advance. According to the teaching strategy, JUGAME generates an adaptive puzzle pattern focusing on the knowledge level of the student. JUGAME has been implemented on SONY EWS NWS-1750. Concepts are illustrated in four figures. Contains seven references. (Author/MSE)