Seikado Bunko Art Museum

Found in a quiet residential area near the small Maruko River in Setagaya, roughly a 20-minute walk from Futako-Tamagawa Station, this museum was founded to house the collection of Yanosuke Iwasaki, the second president of Mitsubishi, and that of his son Koyata. Opened to the public in the early '90s, the Seikado now boasts a plentiful archive of classical writings and over 6,500 pieces of ancient East Asian art, including seven National Treasures and 83 Important Cultural Properties of Japan. The brick building itself is also worth a look, as is the Japanese garden on the premises.