|Location||Shimizu, Shizuoka, Japan.|
Nihondaira Observatory (Oohira) is an astronomical observatory that is located on a hill overlooking Shimizu, Shizuoka, Japan. It has been the source for numerous minor planet discoveries by Takeshi Urata. In 2007, the observatory was ranked 43rd in the number of asteroids discovered, with a total of 163, but has since lost its ranking, as the top 50 discovery sites have all discovered more than 400 bodies as of 2016. The International Astronomical Union's code for the observatory is 385. The asteroid 2880 Nihondaira, discovered by astronomer Tsutomu Seki, is named for this observatory. It is often called by its location, Shizuoka.
- Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (2880) Nihondaira. Springer Berlin Heidelberg. p. 237. ISBN 978-3-540-00238-3. Retrieved February 2016.
- "Minor Planet Discovery Sites". Minor Planet Center. 24 February 2016. Retrieved February 2016.
- "List Of Observatory Codes". Minor Planet Center. Retrieved February 2016.