Harmony Hall seems a bit out of place in Tochigi.
Its a nice performing arts building with a fairly decent program. Its well worth checking out if you live in the area.
We just went to see the Tokyo Philharmonic Orchestra. Upcoming program includes the Kodo Japanese drum group, a bunch of interesting sounding classical events including some foreign visitors and lots of more local things like the local nature societies photo display.
We normally think of Nasushiobara as being a real farmer town. Nobody dresses up for anything. But when we went to Harmony Hall to see the Tokyo Philharmonic Orchestra plenty of people had put on their dress up clothes and it felt (just a little bit) like we were in Tokyo for a second.
At least with our horrible Japanese its hard to make much sense of the website. Even the Google translated one. So I'd recommend just dropping by one time and you can get a pretty good idea of whats coming up. Or shooting me an email and I can tell you whats on the way.
Harmony Hall Website
Harmony Hall Website (Translated)
The hall is a very stylish concrete building. It seems to me have been very badly designed for actually getting people in and out.