USSBS memoranda. Admiral Oikawa's reply to Colonel Potts, regarding Japanese Naval preparation at the outbreak of war. Report No. 2-w(33), USSBS Index; Section 8

Naval war preparation chart for 1941 fiscal year. Report No. 79b, USSBS Index Section 2

Estimation of Japanese strength before and after outbreak of Greater East Asia War (December 1941). Report No. 11-a(33), USSBS Index Section 6

Report on Japanese Naval Intelligence submitted by Rear Admiral Takeuchi, Kaoru (IJN) Chief of fifth section (United States and Latin America) of the third department (Naval Intelligence) of the Naval General Staff. Report No. 2-w(4), USSBS Index; Section 8

Translation No. 7-26 June 1940. Japanese estimates and comparisons of the resources as of the beginning and end of the war. Compiled by Intelligence Division, WDGS, Office of Naval Intelligence, United States Navy. Report No. 2-w(20), USSBS Index; Section 8