Tsunkatse is a popular spectator sport in the Delta Quadrant invented by the Norcadians. In Tsunkatse, two contestants battle in an arena wearing polaron disruptors on their hands and feet, which deliver a bioplasmic charge on contact with the opponent's two target sensors, located on the sternum and between the shoulder blades. The object is to attack the opponent's sensors while defending your own. There are two types of Tsunkatse matches: blue and red.
In the 2370s, the sport was controlled by Penk, who captured various humanoids and forced them to fight in Tsunkatse matches against their will. These took place aboard his ship, and were transmitted live via hologram to various arenas in the sector. These fighters included a Pendari male, a male Hirogen fighter, and Seven of Nine. (VOY: "Tsunkatse")