The length of the rochin is usually equivalent to the length of the forearm and can be found in many differing designs varying from spears to short swords and machete-style implements. In use, the techniques tend to be circular in order to avoid excessive contact with the shield. The short spear is predominantly used in an upward stabbing motion, piercing armor under the rib cage, armpits, and throat although dependent upon the type of Rochin used, slashing motions can also be employed.
The length of a rochin typically matches the forearm and comes in various forms, including spears, short swords, and machetes.  When used, circular motions are preferred to minimize contact with shields. The short spear is commonly used for stabbing upward, targeting areas like under the rib cage, armpits, and throat. Slashing techniques can also be employed depending on the specific rochin design.