National Astronomical Observatory of Japan Nobeyama Radiowave observatory

The National Astronomical Observatory of Japan (NAOJ) Nobeyama Radiowave observatory is a world-class research facility and is also known as a sacred place for radio astronomy in Japan. It is open for the general public and can be visited free of charge without reservation. There is also the world's largest 45m radio telescope, a telescope that receives radio waves called millimeter waves, so you can see a huge telescope up close.