Watch the sunlight bouncing off the water as it spills over Ichinokama Waterfall. Keep an eye out for any rainbows that form in the mist.
If you're spending a while in Yamanashi, Ichinokama Waterfall is a great place to start your exploring. This cascade of water is one of numerous attractions that'll keep you busy here. Nishizawa Canyon, Mount Kentoku, and Suwa Shrine are also waiting to be explored nearby.