Japanese for "Tiger".
Was thought to have been used in the phrase "Tora! Tora! Tora!" during the Japanese attack at Pearl Harbor in 1941. However, Japanese historians have shown that it was not so. What was said sounded like "Tora! Tora! Tora!"; but was in fact two different code words -- "To" and "Ra".

"To" indicated that the attack had begun, and "Ra" that success had been achieved.

When said in great speed and excitement, this apparently sounded like "Tora! Tora! Tora!" to the American radio operators.