Kihon Kumite - meaning "basic sparring". This is a paired, prearranged movement technique to get one used to sparring with an opponent. The movements are extremely effective when practiced diligently and used in free sparring.
Ippon Kumite - "One point" sparring. Ippon was called when a strike was delivered that simulated a "killing" blow. Ippon Kumite is practiced to remind us not to become complacent in our practice of sparring.
Jiyu Kumite - "Free" sparring.