The primary school division of Gyosei Kokusai was established in 1995. In 2003 an international course was started at the primary school. The first class graduated from the primary school in March 2009. The primary international course is run in conjunction with the corresponding regular Japanese classes so that students receive the fundamentals of Japanese education while attaining a high level of English proficiency and international awareness.

At present there is one international class for each grade from one to six with a maximum of 35 students per class . Each international class is taught by a native speaker from an English-speaking country.