Expecting World War II to arrive at the coasts of the Empire, Japan began preparing for coastal defense of Honshu and the other islands of the archipelago. As a result, the task arose of creating a tank destroyer that would be capable of coastal defense and could also stand its ground against any Allied armored vehicles in land battles. As armament, various naval gun options were considered, which had been built but were no longer of use to the Imperial Navy. To increase the rate of fire, it was planned to mount a double-barreled gun system on a spacious welded turret. Additionally, to increase firepower, the vehicle would have been mounted with three machine guns (two bow guns and one rear-facing) and a 20 mm gun with a high fire rate on the turret. However, excessive weight and difficulty to produce led to the project being closed.