Murayama, meaning "village mountain", is a very common place name, so there are many other Murayama Inari Shrines than those places, as Majestic-san wrote. The last flag is interesting, by the way. The left column says 鏡䑓山居?書, thus, it's written by someone who lived in Kyōdai mountain. Kyōdai mountain is in Nagano Prefecture, and a Murayama Inari exists in Nagano City, so it could refer to the one in Nagano.