We came to this area to see the snow monkey park, and with some time to spare waiting for the bus, we decided to see the museum. For a few yen we really enjoyed the various exhibitions. The Roman glass was also impressive and I learned about an artifact that I didn’t know existed. I highly recommend to anyone if you have 30 to 60 minutes.
To be honest, it is a nice clean place with (the time I was there) 80% worthy weird art and 20% Roman art (glass pieces).
So, do not expect a European Roman museum, just flow with the place.
It costs ¥500 per adult to enter. The museum is located right near the bus stop that heads back to Nagano station. It's a good place to stop by if you are waiting for the bus and want to warm up after visiting Snow Monkey World. The art display was contemporary but there were no English explanations so it was difficult to understand what the artist was thinking. The building is very cool!
500 yen entrance per adult. The ground floor has beautiful glass sculptures and the second floor has many Japanese paintings, letters, and tools related to Yamanouchi. Some English titles but you'll mostly be able to only tell the year the art was made in.