Pearl Harbor by RobinJRichards

Question 12

In order for the torpedoes to operate in the shallow depths of Pearl Harbor, a new version complete with wooden fins were developed and manufactured in THIS JAPANESE CITY. Almost four years later, the US, with a little help from the weather, exacted their revenge on it.

Nagasaki [Cloud cover over Kokura made Nagasaki, the alternate target, the new target]