This scenic spot is located at the end of the Ninoashi Forestry Road, in the deepest part of Nanasawa. It is the start of the trekking route from the Atsugi side to Oyama, at the point where a mountain stream that takes its source from the underground water at the massif of Mt. Oyama flows in to join the Yataro River. The currents of the Yataro River create the finest valley scenery. This is a spot to enjoy cool temperatures in the summer. The nearby area is also dotted with waterfalls, and clusters of oriental paper bush can be found everywhere in this spot with many highlights.
Get off at Hon Atsugi Station on the Odakyu Odawara Line, take the bus [Atsu 33] [Atsu 34] bound for Nanasawa from Atsugi Bus Center No. 9 bus stop for about 29 minutes, get off at Hirozawaji Onsen Iriguchi, 1 hour and 30 minutes on foot (4.7km)