For decades, Japanese-language education in Japan was sustained not by the state but by the goodwill of volunteers.

A persistent belief that ¡°any native speaker can teach Japanese,¡± combined with a cultural tendency to justify unpaid labor through a sense of personal fulfillment, kept the profession outside formal systems.

Sociologist Yuki Honda has described this mechanism as ¡°yarigai-sakushu,¡± or the exploitation of purpose, a structure in which socially meaningful work is framed as something one should do out of passion, even without adequate compensation. In Japanese-language education, this meant that tasks requiring expertise in linguistics, pedagogy and second-language acquisition were long treated as hobby-like activities rather than professional labor.