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A bō (棒: ぼう), bong (Korean term) or kon (Chinese term), is a very tall and long staff weapon used in Okinawa and feudal Japan. Bō are typically around 1.8 m (5.9 ft) long and used in Japanese martial arts, in particular bōjutsu. Other staff-related weapons are the jō which is 1.212 m (47.7 in) long and the hanbō (half bō) (tahn bong in Korea) which is 90 cm (35 in) long.
The bō is usually made with hard wood, such as red or white oak, although bamboo has been used. The bō may be tapered in that it can be thicker in the center (chukon-bu) than at the ends (kontei) and usually round or circular (maru-bo). Older bō were round (maru-bo), square (kaku-bo), hexagon (rokkaku-bo) or octagon (hakkaku-bo). The average size of a bō is 6 shaku (around 6 ft (1.8 m)) but they can be a long as 9 ft (2.7 m) (kyu-shaku-bō) .
A 6 ft (1.8 m) bō is sometimes called a rokushakubō (六尺棒: ろくしゃくぼう). This name derives from the Japanese words roku (六: ろく), meaning "six"; shaku (尺: しゃく); and bō. The shaku is a Japanese measurement equivalent to 30.3 centimeters (0.994 ft). Thus, rokushakubō refers to a staff about 6-shaku (1.82 m; 5.96 feet) long. The bō is typically 3 cm (1.25 inch) thick, sometimes gradually tapering from the middle (chukon-bu) to 2 cm (0.75 inch)at the end (kontei). This thickness allows the user to make a tight fist around it in order to block and counter an attack.
In some cases for training purposes or for a different style, rattan was used. Some were inlaid or banded with strips of iron or other metals for extra strength. Bō range from heavy to light, from rigid to highly flexible, and from simple pieces of wood picked up from the side of the road to ornately decorated works of art.
Martial arts 
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The Japanese martial art of wielding the bō is bōjutsu. The basis of bō technique is te, or hand, techniques derived from Quanfa and other martial arts that reached Okinawa via trade and Chinese monks. Thrusting, swinging, and striking techniques often resemble empty-hand movements, following the philosophy that the bō is merely an "extension of one’s limbs". Consequently, bōjutsu is often incorporated into other styles of empty hand fighting, such as karate. Traditionally this was mainly true for the Okinawan styles, such as Shōrin-ryū, but Hirokazu Kanazawa, 10° Dan Shōtōkan-ryū, created two kata of his own in the 1970s (which he published on DVD in 2009) and regularly teaches bō seminars worldwide. With these kata he is the first master to create Shōtōkan-ryū bōjutsu. Stan Schmidt, Chief Instructor South Africa JKA, writes:
"Master Kanazawa has realised the benefit of weapons training and thus extended The Art of The Empty Hand to include weaponry as natural extensions of karate techniques. All leaders of Karate should seriously consider that their advanced students would be a whole lot better off for having some insight into weaponry such as the Bo, as an extension of Karate-do"
As in Okinawa-te, in bōjutsu attacks are often avoided by agile footwork or jumps and returning strikes made at the enemy’s weak points.
The bō is typically gripped in thirds, and when held horizontally in front, the right palm is facing away from the body and the left hand is facing the body, enabling the bō to rotate. The power is generated by the back hand pulling the bō, while the front hand is used for guidance. When striking, the wrist is twisted, as if turning the hand over when punching. Bō technique includes a wide variety of blocks, strikes, sweeps, and entrapments. The bō may even be used to sweep sand into an attacker’s eyes.
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The earliest form of the bō, a staff, has been used throughout Asia since the beginning of recorded history. The first bo were called ishibo, and were made of stone. These were hard to make and were often unreliable. These were also extremely heavy. The konsaibo was a very distant variant of the kanabo. They were made from wood studded with iron. These were still too cumbersome for actual combat, so they were later replaced by unmodified hardwood staffs. The bo used for self-defense by monks or commoners, the staff was an integral part of the Tenshin Shōden Katori Shintō-ryū, one of the martial arts’ oldest surviving styles. The staff evolved into the bō with the foundation of kobudo, a martial art using weapons, which emerged in Okinawa in the early 17th century.
Prior to the 15th century, Okinawa, a small island located south of Japan, was divided into three kingdoms: Chuzan, Hokuzan, and Nanzan. After much political turmoil, Okinawa was united under the Sho Dynasty in 1429. In 1477, Emperor Sho Shin of the second Sho dynasty came into power. Determined to enforce his philosophical and ethical ideas, while banning feudalism, the emperor instituted a ban on weapons. It became a crime to carry or own weapons such as swords, in an attempt to prevent further turmoil and prevent uprising. In 1609, the temporary peace established by Sho Shin was violently overthrown when the powerful Satsuma Clan invaded Okinawa. Composed of Japanese samurai, the Satsuma Clan took over the island, making Okinawan independence a thing of the past. The Satsuma placed a new weapons ban on the people of Okinawa, leaving them defenseless against the steel of the samurai’s swords. In an attempt to protect themselves from the devastating forces of the Satsuma, the people of Okinawa looked to simple farming implements, which the samurai would not be able to confiscate, as new methods of defense. This use of weapons developed into kobudo, or "ancient martial art," as we know it today.
Although the bō is now used as a weapon, its use is believed by some to have evolved from the long stick (tenbin) which was used to balance buckets or baskets. Typically, one would carry baskets of harvested crops or buckets of water or milk or fish etc., one at each end of the tenbin, that is balanced across the middle of the back at the shoulder blades. In poorer agrarian economies, the tenbin remains a traditional farm work implement. In styles such as Yamanni-ryū or Kenshin-ryū, many of the strikes are the same as those used for yari ("spear") or naginata ("glaive"). There are stick fighting techniques native to just about every country on every continent.
See also 
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|Look up 棒 in Wiktionary, the free dictionary.|
- Weaponless WarriorsRichard Kim,Black Belt Communications, 1974 P.26
- Bo, karate weapon of self-defense, Weapons Series, Fumio Demura, Publisher Black Belt Communications, 1976, ISBN 0-89750-019-9, ISBN 978-0-89750-019-7 P.10
- Bo, karate weapon of self-defense, Fumio Demura, Black Belt Communications, 1976 p.19
- Jo: Art of the Japanese Short Staff, Dave Lowry, Black Belt Communications, 1987 p.22