Kii Channel
On March 16, 2008, then 69-year-old Japanese sailor and environmentalist Kenichi Horie left the Hawaii Yacht Club, Honolulu, in "Suntory Mermaid II", bound for Japan. He arrived on July 4, 2008 in the Kii Channel offshore of Hinomisaki cape, Wakayama, Japan, without incident. Horie had made the world's longest solo voyage in a wave-powered boat, using green technology.