While exact figures are unavailable, but it is fair to assume that a large number of foreigners who work in Japan will spend at least some of their time teaching in a language school.
But should you lose yourself in the facelessness of a large company, or take a job in what may be little more than a family-run operation where you are the only teacher?
The average salary for language teachers has dropped substantially in the past 10 years, mirroring the downturn in the Japanese economy. A quick scan of the classified ads in newspapers or on one of the many Internet recruitment sites now operating shows that there isn't a huge variation in the salaries paid at large and small schools.