Properly translated as "In The Hollow of a Wave off the Coast at Kanagawa", this famous Hokusai print is taken from his famous collection, "Thirty-six Views of Mount Fuji".
Download a gorgeous full-color reproduction of this GIF from the University of Washington's ukiyo-e gallery, or try this alternate site in Rochester, NY. It's big and beautiful! (warning: 526K image/approx. 5 minutes at 28.8 k/bps)