Abstract
Epidote-(Sr) is new mineral which was reported by Minakawa et al. (2008). In this time, epidote-(Sr) was found from Shiromaru mine, Tokyo prefecture, Japan when Shiromaru dam discharged water in 2016. Epidote-(Sr) from Shiromaru mine occurs as vein cut a reddish chert which contains hematite. The occurrence is similar to Ananai mine. It is considered that the vain was formed by last stage hydrothermal effect after formation of Manganese deposit.