Hoshū jugyō kō

Hoshū jugyō kō (補習授業校), or hoshūkō (補習校), are supplementary Japanese schools located in foreign countries for students living abroad with their families. Hoshū jugyō kō educate Japanese-born children who attend local day schools. They generally operate on weekends, after school, and other times not during the hours of operation of the day schools.

The Ministry of Education, Science, Sports and Culture (Monbusho), as of 1985, encouraged the opening of hoshū jugyō kō in developed countries. It encouraged the development of full-time Japanese ("person", not "language") day schools, in Japanese nihonjin gakkō, in developing countries. In 1971, there were 22 supplementary Japanese schools worldwide.

By May 1986, Japan operated 112 supplementary schools worldwide, having a total of 1,144 teachers, most of them Japanese nationals, and 15,086 students. The number of supplementary schools increased to 120 by 1987. As of April 15, 2010, there are 201 Japanese supplementary schools in 56 countries.