MARCH 29, 1941.
From: Ft. Shafter.
To: The Adjutant General.
FORT SHAFTER, No. 2492, March 28, 1941.
For G-2. Colonel Hideo Iwakuru, IJA passed through Honolulu 15th aboard Tatsuta Maru enroute Washington, D. C. Nippu Jiji of Honolulu reported, "Colonel Iwakuro was formerly head of military affairs section of Military Affairs Bureau which is probably the most important office in the army. He is so influential that there is no one in army circles who does not know him. We do not know what mission this colonel is on but in view of the times the visit of so important an army personage is worth our attention."
(PROCEEDINGS OF CLARKE INVESTIGATION pg. 190