In August 1940, Japanese battleship YAMATO was finally launched at water from Kure naval yard's dry dock. Work on the YAMATO project began with the development and modernization such as the huge armament 46cm turret, it was in 1934. This project was in a top secret for a while because the YAMATO had to be a final hope for Japanese naval at that time. Most of main countries which had naval were tying to develop the plan enforcing naval because the Washington Treaty of 1922 prohibiting on the construction of new battleships according to its size, weight, and armaments were supposed to be expired in those days.