The footage here will give you a good indication of the intense destructive power of the tsunami that was generated by the 9 magnitude Earthquake that hit off the east coast of Japan on the 11 March, 2011 at 14:46.
RIP to all those that lost there lives.
The term tsunami comes from the Japanese 津波, composed of the two kanji 津 (tsu) meaning “harbor” and 波 (nami), meaning “wave”