About the Ninja Museum in Iga Ueno

Just wanted to mention that the info on this site is wrong.
The show is every day except Wednesdays. Not Tuesdays.

I was very disappointed discovering this on a Wednesday recently. Please correct your info page.

Sorry to hear that you missed the show. However, the information on japan-guide.com is correct. The regular closing day is still Tuesday. But in addition to Tuesday, there are some irregular holidays for various reasons. I am afraid you went just on such a irregular holiday.

For future travelers who don't want to miss the Ninja show, I recommend to confirm by phone before going: 0595-23-0311.

Ok.
I do want to mention that when I asked them about this and told them about the info I'd found on the web they couldn't understand - according to them they'd always had shows every day except Wednesdays only (as they told me).
So to others planning a trip it's perhaps wise to avoid Wednesday as well - just in case. :)

according to them they'd always had shows every day except Wednesdays only (as they told me).

They told me two days ago (in Japanese by phone) that the ninja shows are held on all days except Tuesdays and some other irregular days, but that usually shows are held on Wednesdays.