Ok fine. The proportions are off. So let's do some guesstimates based on the total energy. According to this http://www.geologyinmotion.com... the 2011 Japan tsumani had somewhere between 31 and 3100 KILOTONS of energy. That's equivalent to the energy in 1 to 100 Hiroshima nuclear bombs. So I'll leave it as an exercise to the reader to figure out how to power a line of giant squirt guns that deliver the equivalent of between 1-100 Hiroshima nuclear bombs of energy as a directed stream of water.
While you're at it, I think the military might be interested in your nuclear water cannon.