The Wave, print by Hokusai - The Great Wave off Kanagawa ;"Under a Wave off Kanagawa", also known as The Great Wave. - While sometimes assumed to be a tsunami, the wave is more likely to be a large okinami ("wave of the open sea").
Woodblock printing process / This image shows a sample of the woodblock printing process used to create the original "Great Wave" prints. Although the method seems slow to us today, this would have been much quicker than painting each by hand. It also makes each one fairly exact.