the dynamic whirling tides near noshima island (能島水軍潮流体験) in seto inland sea, japan

attraction cruise current eddy ehime flow imabari inland island japan kaido kaikyo miyakubo murakami naikai noshima ocean ohshima oshima pirate scene scenery scenic sea seascape seto setouchi shikoku shima shimanami sightseeing straits tidal tide tourism tourist vortex water wave whirling whirlpool しまなみ海道 宮窪 水軍 潮流 潮流体験 瀬戸内 瀬戸内海 能島 能島水軍