Techniques
Chou
Chou is one of the characters from Rurouni Kenshin. Chou doesn't have a specific style, but he does have some very deadly techniques. It helps that he has such a high arsenal of weapons.
Chou's Weapons
Renbatou (cutting blade), after the two swords on Chou's back were broken by Kenshin, the broken halves came together to form a single doubled bladed sword, the Renbatou. The Renbatou was designed by Arai, it was designed to inflict two separate wounds. As Chou stated these wounds would not be able to be stiched and it would eventually cause you to die by bleeding to death.
Hakujin no Tachi, this was also designed by Arai. During the fight with Kenshin Chou had this sword wrapped around his stomach because it also worked as an armor. This sword is in a sense shaped like a whip. This sword was forged to be as this as possible, while still maintaining the same strength as a sword. The tip of this sword is waited so that a slight flick of the wrist can change its direction.
Waza
Sakasa Chuukuu Notou, not quite a move that you should use in a fight. This techique is performed by flicking a sheathed sword upward, to send the sheath flying into the air, then holding the sword directly above, and letting the sheath fall directly back onto the sword. Chou did this with a baby on the sheath in order to encourage the swordmaker to tell him where a certain sword was.
Serpent Style, used with the Hakujin no tachi, Chou during the show used the word "Orochi" (serpent) to describe the style he was using with the sword. He directs the blade to move along the ground like a snake, then instantly move upward and coil around the opponent, allowing no chance for escape.