IJN at time of Pearl Harbor Attack in December 1941: (1) Ibuki ordered but not laid down (2) Mogamis designated light cruisers but were built to be up-gunned as heavies once the London Naval Treaty was broken.
(1) 4 Agano and 2 Ōyodo (1 cancelled).
(1) 27 Yūgumo class and 16 Akizuki-class building (2) Others ships of the Momi-class were re-rated as patrol vessels.
Also, note than Momi name was assigned in 1944 to a Matsu-class destroyer ship Many under direct navy control as armed merchantmen.
Imperial Japanese Navy commanders at the time of the Attack on Pearl Harbor: