解説First dome and solar 8-inch refractor NAOJ 2010.jpg
English: Dome for 8-inch (20 cm) refractor telescope in Mitaka campus of National Astronomical Observatory of Japan, Mitaka, Tokyo, Japan. The First Dome, built in 1921, is the oldest building currently exist in NAOJ.designed by Tokyo Daigaku Eizen-ka.
{{Information |Description={{en|1= Dome for 8-inch (20 cm) refractor telescope in Mitaka campus of National Astronomical Observatory of Japan, Mitaka, Tokyo, Japan. The First Dome, built in 1921, is the oldest building currently exist in NAOJ.}} |Source=o