Just when you thought you were "templed out"...The Jimmu Temple is a short walk from the Jinmuji Station on the Keikyu Line. Basically you walk out the station, make a left at the light a the station. Follow that road keeping the tracks on your left. At the second light you will see a drawing of a little man hiking. Make a right there and follow that road along the sports fields and behind an elder center. The trail is pretty wide and obvious.
At one point you come to a spot with signs in kanji. Take the trail to the right. Once at the top of the hill, take a left. You'll see the temple there.
According to a book I have, the Jimmu Temple's history can be traced to 1590. Samurai fleeing from Hikeyoshi's siege of Odawara Castle took refuge here.