This database lists almost 400 language schools throughout Japan. Most schools are private language institutions, but some are attached to universities, colleges, and technical training schools or are affiliated with an organization. You can use the database to search for Japanese language schools in Tokyo and other prefectures in Japan.
For Tokyo Metropolis and Kanagawa you can refine the search by areas/wards (e.g. Shinjuku, Shibuya, Yokohama, etc.), but you must first select the prefecture. You can also filter the results by a range of other criteria including course type, study purposes, accommodation arrangements, and nationalities of other students.
Search for Japanese Language Schools
* Nationality. Use this box to filter schools where more than 10% of students come from a particular country or region. Note that not all language schools disclose student numbers and nationalities of enrolled students