Utono Inari Shrine is within the grounds of Usuki Castle ruins.
The Utono Gate used to lead down to the sea but the island the castle was on is now completly landlocked by infill and development.
The shrine was built at the same time as the castle, 1562, by Otomo Sorin who moved his base here from Funai.
As such it was probably a private shrine and not open to the public, like Taikodani Inari in Tsuwano.