Established by Toto, the manufacturer of bathroom appliances, Gallery Ma is a small two-story gallery located above a Nogizaka showroom. They specialize in modern architecture and contemporary design, with frequent exhibitions devoted to international architects. There are three separate gallery areas, including an outdoor space, and sometimes there are multiple exhibitions happening concurrently.

Beneath the gallery space is a well-stocked architecture bookstore and a magazine-library space where you can sit and catch up on your architecture-magazine reading. The gallery runs an architecture publishing house as well.