Oyashiki is a small enclave at the top of a hill in the Koshu area of Yamanashi. In addition to having a couple of very attractive temples (Erin-ji and Hoko-ji), it also boasts a functioning waterwheel and orchards full of persimmons.
Many of the homes in Oyashiki maintain a traditional appearance and I found one that has been preserved in its original tsuchikabe (mud-walled) state.
If you visit in November, you will see hoshigaki (dried persimmon) dangling from the eaves of many homes. This village is an attractive setting for two very beautiful temples.
You can access Oyashiki from JR Shinjuku Station in just under 1.5 hours by taking an express train to JR Enzan Station on the JR Chuo Line. Once you arrive in Enzan, take the Nishizawa-Keikoku-bound bus from the south exit of JR Enzan Station. Get off at the Erin-ji-mae stop. Oyashiki is the area surrounding Erin-ji Temple.