Japanese ships assigned routes between Japan and the Mandates according to the U.S. Joint Intelligence Committee. Daily summary dated 14 April 1942

An item reported that Japanese ships were assigned definite routes between Japan and the Mandates and now extending into the New Britain area [Australian mandated territory]. In the vicinity of the Bonin Islands were escorts available if needed.

Source

Map Room Papers (Roosevelt Administration), 1942 - 1945. U.S. Joint Intelligence Committee. Daily summary No. 125 dated 14 April 1942