Iga Ueno Nija Museum shows

Apparently, this museum is sometimes closed, and sometimes doesn't do the Ninja demonstration shows. Is there a way (in English) to find out if they are open and doing shows on a particular day? We hope to go there on Sunday July 18. I know the next day is a national holiday, but don't know if that makes any difference.

I recommend to inquire directly. The y have an English contact form:
http://iganinja.jp/en/inquiry/index.php

As always, you have helpful information.

Do check with them beforehand. If you don't stay over there (which I wouldn't really recommend - it's not a very exciting town) it's quite off the beaten path and pretty annoying to come all that way and miss a show. Which happened to us.
We traveled to the museum from Kyoto one day they were supposed to have shows according to this website and other guides, but for some unknown reason they didn't (and to us it seemed they'd never had any on that particular day).
Very nice museum nevertheless, so it wasn't a complete waste. :)