Converted aircraft carrier added to Japanese fleet according to the U.S. Joint Intelligence Committee. Daily summary dated 29 January 1942

An item referred to the J.I.C. commenting that at least one converted aircraft carrier seems to be added to most of the existing five Japanese carrier divisions.

Source

Map Room Papers (Roosevelt Administration), 1942 - 1945. U.S. Joint Intelligence Committee. Daily summary No. 50 dated 29 January 1942