The Mitsubishi J8M "Shūsui" (Japanese: 三菱 J8M 秋水, literally "Autumn Water", used as a poetic term meaning "Sharp Sword" deriving from the swishing sound of a sword) was a Japanese World War II rocket-powered interceptor aircraft closely based on the German Messerschmitt Me 163 "Komet". Using only the above description and what you know about the world, "The Japanese WW II rocket powered aircraft name means Sharp Sword." is definitely correct, incorrect, or inconclusive? 