Yoichi is the hometown of scientist and first Japanese astronaut Mamoru Mohri. He went on his first space mission in 1992, and a space dome was made to celebrate this. It has a lot of information on the cosmos, and scale models as well. Yoichi Space Museum is a facility adjoining the Space Apple Yoichi roadside station.
Drive along national highway 229, and you'll find the museum at the junction of national highways 5 and 229.
The museum has many exhibits that both adults and children can enjoy. The Digital Planetarium uses computer graphics to project the star fill-d sky onto the inside wall of the air dome, and you can also watch movies in the 2041 Solar System Mission 3D Theater.
The museum also has a 1/20-scale model of the International Space Station, a 3/4-scale Hubble Space Telescope, and a life-size model of the International Space Station Kibo laboratory where Japanese Astronauts Naoko Yamazaki and Soichi Noguchi stayed. You can also buy space food at the gift shop if you want to try something a little different.