国立天文台
Its HQ is located at the present day National Astronomical Observatory of Japan, Mitaka Campus, Mitaka. It is affiliated with the Tokyo Metropolitan Police. It monitors and provides information on the actions of the Stars of Contractors in the "false sky". After Darker than Black and Darker than Black: Shikoku no Hana, the entire observatory was officially declared closed with its equipment and personnel taken over by Section 3.