Goukaku Boy Series - Eitango Target 1900 is a Game Boy game within the Goukaku Boy educational series. It concentrates on expanding English vocabulary, specifically aiming for mastery of 1900 words.  Gameplay revolves around vocabulary exercises, quizzes, and memorization techniques.  These games are usually created by Japanese companies specializing in educational software for students, and the exact developer for this entry requires further investigation.

Goukaku Boy Series - Eitango Target 1900 (Japan)

Goukaku Boy Series - 99 Nendo Ban Eitango Center 1500 (Japan)