Japanese naval oil storage at Ominato on 27 June 1941

The American Naval Attache at Tokyo wrote that the estimates were prepared after considerable research and consulting the British Naval Attache at Tokyo and reasonable correct. If available were past estimates placed in parenthesis. It was furthermore reliable reported that all naval oil tankage was kept filled to capacity meaning that indicated amounts were the very minimum of Japan.

At Ominato were 12x7,000 tons each on the north end of pine grove fronting the harbour. Total estimated capacity 120,000 tons (91,000).

Source

National Archives USA. Record Group 38: Records of the Office of the Chief of Naval Operations. Series: Secret Naval Attaches Reports. Report dated Naval Attache at Tokyo dated 27 June 1941 No. 71/602-1000. M975-002.