What meaning is there behind the World Martial Arts Tournament logo?
Budou (武道) is a Japanese term describing Japanese martial arts. Budou consists of the kanji "bu" (武, ぶ), meaning "war" or "martial," and dou (道, どう), meaning "path" or "way."

The tournament is called the 天下一武道会, "Tenkaichi Budoukai," which can literally mean: "(Best) Martial Arts on Earth (Under the Sky) Tournament."