Satohito, posthumously honored as Emperor Reigen was the 112th emperor of Japan, according to the traditional order of succession. Reigen's reign spanned the years from 1663 through 1687.

This 17th-century sovereign was named after the 9th-century Emperor Seiwa, sometimes posthumously referred to as Mizunoo because this is the location of his tomb, while go translates as "later", and t