Nichihara (日原町, Nichihara-chō) was a town located in Kanoashi District, Shimane Prefecture, Japan.
On September 25, 2005, Nichihara was merged into the expanded town of Tsuwano.
[1] The town has a sky observatory which once had one of the biggest lenses in Japan.
The Takatsu river runs through the town and in the summer season fishermen catch Ayu fish, a local delicacy.
It is said to be the cleanest river in Japan, thus producing said Ayu fish.