Kanji Boy is an educational Game Boy Color title released in Japan. The game likely focuses on teaching players the Japanese writing system (Kanji).  Gameplay probably involves various mini-games and exercises designed to enhance Kanji recognition and writing skills.  The game's age suggests a simple interface and educational approach.  The publisher was most likely a Japanese company focused on educational software.

Kanji Boy (Japan)

Kakurenbo Battle Monster Tactics (Japan)