Muikaichi, Shimane

 was a town located in Kanoashi District, Shimane Prefecture, Japan.
As of 2003, the town had an estimated population of 6,124 and a density of 30.84 persons per km². The total area was 198.57 km².
On October 1, 2005, Muikaichi, along with the village of Kakinoki (also from Kanoashi District), were merged to create the town of Yoshika.