The katana, (Often referred to as the "Samurai Sword,") is a strictly offensive weapon.
Forging the blade was a religious act, and the forging method was a closely guarded secret known only to a few Master Sword makers. Those secrets have been passed down through the ages only to the family members deemed worthy. Only a handful of these master craftsmen are practicing the art today, keeping alive the majesty and beauty of the greatest blade ever forged.
Tonfa, meaning "handle," consists of two billets made of hardwood. A long handle is set about six inches from one end of each billet. It can be used to block or parry another weapon and can also be spun in a circular motion to thrust or strike. Apart from martial arts, they are also considered practical weapons by the military and law enforcement.
Kama are short handled sickles, also developed from Okinawan farm implements and used to combat the Samurai Sword
Bo (staff) is a wooden pole approximately six feet long. Its original use, before becoming a martial arts weapons, was utilitarian. Peasants balanced heavy loads at each end of the bo and carried it across the shoulders.
Sai (sometimes called jitte,) are a pair of pronged truncheon used defensively against the bo or katana. Its design stems from the concept of a pitchfork and was originally developed in Okinawa during the Japanese occupation of those islands.
The nunchaku means wooden flail. Originally used as a rice thresher, it consisted of two unequal lengths of hardwood connected by a horse-hair cord. Modern nunchaku are constructed of lighter wood with handles of equal length. Nylon cords or lengths of chain have replaced the old horse hair in many variations of the weapon. The nunchaku can be wielded with tremendous velocity in striking and are also valuable in parrying attacks from other weapons.