Kanmon Strait separates Kyushu from Honshu, the largest island in the Japanese archipelago. To reach its next stops at Oshima and Hiroshima after leaving Fukuoka, Hokule'a will pass through Kanmon strait and enter the Seto Naikai, or Inland Sea. The Kanmon Bridge, 783 yards long, crosses the strait above the city of Shimonoseki, Honshu; car and rail tunnels go beneath the strait. The tidal flow through this narrow strait is strong, so small vessels time their entrances and exits to the tides.