Long ago, there was a Vast Continent called a Mu on the Pacific Ocean. Church-ward explained the continent that had sunk in to the sea by a big tsunami with a height of no less than 33 meters and a big earthquake 12 thousand years ago. If these are true, there was a vast continent in the middle of the Pacific Ocean. However, the research of a deep sea plate also was improved, it is known that the possibility that such a continent existed is very low geologically. Moreover, the theory of Churchward has many questions, and now it isn't seriously considered. However, the originality, the sentences full of confidence and the researching of Churchward won over people. His book, the “Lost Mu Continent” became a best seller.