I enjoyed my visit here. There was information in English and I was fortunate enough to get the gist of the Japanese tour and well through my own ability and the help of a friend. This seems to be a very unusual historical place, as it's quite rare (allegedly it's only here?) to see animal sacrifice in Japan. Not that you get to watch it but that it was practiced here in the past. The grounds themselves are also quite nice to stroll through.
This Museum was built in 1991 for the preservation and display of the over 1600 documents collected by the Moriya family.
Would have been more interested if the guide there had explained using a little bit more understandable language. He had such a quick tongue not even my Japanese parents in law managed to decipher what he was saying.
Fascinating glimpse into the ancient history and tradition of Suwa. Housed in a fantastical structure, with walks out past several others and through woodlands to several sites of the Suwa shrines.
There is an English leaflet, the collection is small and will not take long to view, but worth a diversion if interested in local history.