Japanese nervous about presence of Allied submarines in their waters according to the U.S. Joint Intelligence Committee. Daily summary dated 24 March 1942

An item reported that the Japanese were continuous nervous about Allied submarines operating in their waters and increased the number of air patrols.

Source

Map Room Papers (Roosevelt Administration), 1942 - 1945. U.S. Joint Intelligence Committee. Daily summary No. 104 dated 24 March 1942