Chūichi "King Kong" Hara was a Japanese admiral in the Imperial Japanese Navy during World War II. Heavier and taller than the average Japanese person, he was nicknamed "King Kong" by his friends earlier in his career.

The 4th Fleet was a fleet of the Imperial Japanese Navy. The Fourth Fleet designation was used during three separate periods. The initial designation was for a group of ships that were assigned to work together during the Russo-Japanese conflict and the period of its immediate aftermath. The second time the designation was used was during the Sino-Japanese conflict, and the third time was as a South Pacific area of command during the middle of the Pacific War.