I think Yamamoto is a fairly common Japanese name. It was the name of the admiral who designed the attack on Pearl Harbor. He was against attacking the United States. He thought it was suicide, but since he was given the job of planning it, he did the best he could, and it was successful beyond their wildest dreams at least temporarily.
36 years before he was the admiral responsible for defeating the Russians in the 1905 Russo-Japanese war. He’s actually a pretty fascinating guy.