The Shimane Maru class was a pair of auxiliary escort carriers built for the Imperial Japanese Navy (IJN) during World War II.

The class consisted of two oil tankers of 10,002 gross register tons (GRT) that were modified by the Navy to provide minimal anti-submarine air cover for convoys going from Southeast Asia to the Japanese homeland.

The conversion consisted of fitting a full-length flight deck, a small hangar, and a single elevator.

The only other change was the rerouting of the boiler uptakes to the aft starboard side where they discharged in a typical downward-facing funnel.

[1] The Shimane Maru-class ships were fitted with a single geared steam turbine set with a total of 8,600 shaft horsepower (6,400 kW).