The Japanese Language Institute (JLI) is managed by the International Education Center, which was established in 1947and authorized as a nonprofit organization by the Tokyo Metropolitan Government. The IEC is the parent organization of both the Japanese Language Institute and Nichibei Kaiwa Gakuin.
Editor’s Note: This is the school where I studied for one 10-week term. I highly recommend it. One very nice aspect of the school is that a course lasts 10 weeks so you can take a course without needing a special educational visa.