Is Toyosato Elementary School open to visitors? K-On! was based on a real-world elementary school in Toyosato. According to this article on Wikipedia, the elementary school moved to a new building in 2004.

Is the old elementary school open year-round to visitors and anime fans?
Yes it's open to public.
The other room of the building is using as office of city.

Some small things if you want to visit.


You need to check schedule, for example 3/1 to 3/18, it was closed.
8:30 to 17:00 on weekday. 9:00 to 17:30 on weekend.
It's free but need to sign-in.
Some people brake the building the city considering to close. be a good otaku.