Daily: 9:30 a.m. - 11 p.m.
Daily: 9:30 a.m. - 5:30 p.m. (- 11 p.m. on the 2nd and 4th Mon each month - when the North Observatory is closed)
South Observatory is closed on the 1st and 3rd Tue every month, North Observatory on 2nd and 4th Mon every month.
Official site http://www.metro.tokyo.jp/ENGLISH/OFFICES/observat.htm
地址 2-8-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo, Japan
坐标 35°41'22.208" N 139°41'30.159" E