The Type 93 designation was given to this mortar as it was accepted in the year 2593 of the Japanese calendar (1933).

[2] The Type 93 may have been a transitional model and only produced in small numbers.

It is described as being meant for motor transport due to its weight but it lacked a wheeled carriage for towing and was difficult to move.

The body was made of machined cast steel and was threaded at the front for a nose fuze and at the rear for a finned tail.

Five bourrelets were machined around the middle of the projectile that acted as a gas seal.