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Navy Directive No. 5

21 November 1941
Directive to: Yamamoto, C in C, Combined Fleet

1. The Commander-in-Chief of the Combined Fleet will immediately assemble and call back the operational units if the Japanese-American negotiation is successful.

2. The exercise of military authority cited in the Imperial General Headquarters Navy Order No. 5 will be effected in the event the American, British, or Dutch naval forces invade our territorial waters and carry out reconnaissance, or approach our territorial waters and their move is recognized to be threatening, or an aggressive act is taken to endanger us even beyond our territorial waters.

Chief of the Naval General Staff
Nagano, Osami