Oyama

Oyama is a mount located in Isehara city, in the Tanzawa Natsional Park. I went there myself few years ago for a little walk through the hiking course. There is few events there and the main one is the Tofu festival held in end of February, around the last week end. Next matsuri will be soon, end of August. (28th~29th). It is a mikoshi (people carrying a shrine on their shoulders)

Oyama has 3 levels. Lower level with all the restaurants and shops. You can have a tofu based lunch or diner after your hicking. They close early on the Low season. 4~5pm if I remember well.

You have also a cable-car station. It will bring you to the second level where you can find a temple, the Ōyama-dera. The cable-car has a sub-station in the middle but you only have access to some hicking tracks. Nothing else.

To reach the Top Level, you will have to walk. It is not that hard. I did it with a 1yo baby on my back. Dirt and big stones so do not come with high hills like the basic japanese dating girl. From the top, you will have a clear view through the shonan area to Yokohama. You can see the Fuji from the other side. The shrine on the top end, Ōyama-Afuri Jinja, has nothing impressive, even disapointing. Do not come for this. Come to enjoy the walk and the nature.

Take the Oyama Cable Station-bound bus from the North Exit of Isehara Station on the Odakyu Line and get off at the last stop (30 minutes)
If you come by car, you will find some "private owned" parkings for 1000~1500¥/1day. (I went in December). Forget the baby car, stairs start from the first shops.

Wikipedia (eng)
Tourist Info

Oyama, Tanzawa