The Kama (カマ) is a weapon very used by non kobudoka; indeed it is a common  farming sickle.

Kama techniques include blocking, stabbing, striking and cutting.
Normally only senior practitioners perform Kama Kata.

Katas (カタ) :

Kama nuti
Shimotsuki kama

As an illustration an impressive exhibition performed by Kenyu Chinen (Oshukai)