The National Astronomical Observatory of Japan Library is the direct successor to the library of Tokyo Astronomical Observatory. The Library houses books and bound journals on astronomy, astrophysics, space science, geophysics, etc. The library also houses the rare book and manuscript collection including Japanese and Chinese books on astronomy and calendariography.

Library Hours

• Non-affiliated users will be given a badge at the "guard house near the entrance". Please wear your badge in a visible place.

For more information: Visit Guide

• The entrance to the library is on the first floor (west side) of the "S2-South Building"
• Non-affiliated users who wish to use the library must apply for a day-use visitor card at the "library front desk".
• The users are required to wear the card at all time to facilitate easy visual inspection and verification while in the library and return it to the library when they leave the library.

• Weekdays : 9 a.m - noon and 1 p.m. - 5 p.m.
• Weekends and holidays: closed.
• Library hours are subject to change. Hours changes and closings will be announced on the library website or will be posted in the NAOJ Mitaka Headquarters facilities.

Library location

Library services

• Contact us if there is request or consultation
• Non-affiliated users may use the library (except rare books) but they do not have borrowing privileges at the library. Also, if the users wish to use materials on microfilm, they need to contact the library in advance.
• Document Photocopy Service:Non affiliated library users may place a request for fee-based document delivery (35 or 60 yen/page). Please complete the request form at the library front desk. Please note the following restrictions regarding the service.
• A Document Photocopy request is limited to research and private study purposes. Document Photocopy services operate under copyright law guidelines. For example, copying substantial part of the copyrighted work is not allowed by the law.