The fiercest serpent may be overcome by a swarm of ants.
Statement in opposition of the planned construction of the Yamato class battleships, as quoted in Scraps of paper: the disarmament treaties between the world wars (1989) by Harlow A. Hyde. In this statement, Yamamoto implies that even the most powerful battleships can be sunk by a huge swarm of carrier planes. This remark also proved prophetic as both Yamato and Musashi would be sunk by overwhelming air attacks.
Should hostilities once break out between Japan and the United States, it is not enough that we take Guam and the Philippines, nor even Hawaii and San Francisco. To make victory certain, we would have to march into Washington and dictate the terms of peace in the White House. I wonder if our politicians, among whom armchair arguments about war are being glibly bandied about in the name of state politics, have confidence as to the final outcome and are prepared to make the necessary sacrifices.Isoroku Yamamoto
A military man can scarcely pride himself on having "smitten a sleeping enemy"; it is more a matter of shame, simply, for the one smitten. I would rather you made your appraisal after seeing what the enemy does, since it is certain that, angered and outraged, he will soon launch a determined counterattack.Isoroku Yamamoto
In the first six to twelve months of a war with the United States and Great Britain I will run wild and win victory upon victory. But then, if the war continues after that, I have no expectation of success.Isoroku Yamamoto