Origin
The original tsunami was the origin of Japan. A big tsunami came and uncovered the islands of Japan. It's the origin of all life, as far as Japanese people are concerned.
Picture the original tsunami used in the origin story of Japan. It was huge. Bigger than anything you've ever seen. And without it you wouldn't have your precious anime and manga.
げん
みなもと
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This tsunami was also the origin of Genji (げん), from "The Tale of Genji." Just think, without this origin, Japan wouldn't exist and neither would the first Japanese heartthrob, Genji!
The origin of Genji was the origin of all Japan: a big ol' tsunami.