So far, Studio Ghibli is the frontrunner. The makers of Mononoke and Spirited Away.

I was also wanting to see the studios that make Naruto, Ghost in the Shell, and One Piece, but forget there names.

Are there any others I can see?

Someone is putting an itinerary together over there for us, and she wants me to let her know.

Are there any famous manga houses too that are open to the public?