Just across the road from Saikyo-In was a much bigger temple so I stopped in to have an explore. It was not one of the pilgrimage temples but I consider those just way points on a journey, and all the things inbetween are just as much a part of the pilgrimage.
There was no-one around and also no signboard so I could find out nothing about it other than its name.
I am guessing it is a Shingon temple, 2 clues being that there were a couple of Fudo Myo statues, and he is particularly popular with Shingon, and the structure in the photo below is I believe a Shingon style pagoda.
I could be wrong, of course!