ECC Foreign Language Institute (ECC外語学院, -gaigo gakuin) is one of the major private English teaching companies or eikaiwa in Japan.

[3] In November 2013 it was reported that ECC had 379,267 students studying seven different languages: English, Chinese, French, German, Italian, Korean, and Spanish.

ECC does have limited voluntary overtime, mainly during the peak holiday periods when attendance is high.

ECC foreign instructors are not required to be qualified English teachers, hold any EFL qualifications or have any previous teaching experience.

ECC is a member of the Japan Association for the Promotion of Foreign Language Education (全国外国語教育振興協会, zenkoku gaikokugo kyōiku shinkō kyōkai).

[13] Since then the union has made achievements including English pay slips, flexible paid holidays, unemployment insurance, health and pension insurance, a toll-free number for Kinki district sub-teachers, improved emergency evacuation procedures, a pre-consultation agreement to consult with the union before making changes that affect union members, and mandatory training is now conducted during working hours (or else paid at overtime rates).