If you'd like some outdoor adventure, make sure you visit Mt. Takanosu. No walk around the block, this hike is perfect for a mid-vacation work out. 
You'll find this steep landmass in Okutama. Once you've explored everything you can at Mt. Takanosu, check out nearby Okutamaonsen Moegi Hot Spring, Lake Okutama, and Nippara Limestone Caves.













