Newaza is any type of technique done on the ground, which includes ground defense and offensive techniques.
Often referred to as Jiu-Jitsu, newaza includes ground:
Newaza gives students the ability to defend themselves when taken to the ground, which often happens during a self-defense situation.
Shoshin Ryu trains students for all aspects of self-defense, and while Newaza is an extremely useful skill to have when on the ground, its usefulness is minimized in multiple-attacker situations and weapons attacks. Shoshin Ryu students are taught a broad range of self-defense techniques that can be applied standing up, or on the ground, with Newaza being one of the sets of techniques available to them.