Tara and Simon can be seen here training in two different Ko Ryu Ha (Old Schools) of Jujutsu.
Tara is studying kata (techniques and principals) from an Aikijutsu school and Simon is training a kata from Hontai Takagi Yoshin Ryu.
Although both these schools are quite different from each other, they both have many 'control & restraint' type concepts for controlling an opponent without always having to only use blunt trauma (strikes/kicks) to protect yourself. These kata were popular in the Edo Period of Japan, when carrying a sword was banned and un-armed techniques became more frequently used. Very interesting schools when studied in depth.