When does the Mitsui Memorial Museum open?
Hours: 10am to 5pm, last admission at 4:30 pm. Holidays: Mondays. Admission: Adults 1000 yen, High school and college students 500 yen. The address is Mitsui Main Building, 7th Floor, Nihonbashi Muromachi 2-1-1, Chuo-ku, Tokyo.