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The ''gi'' (outfit, from Japanese ''jujutsu gi'' 'jiu-jitsu uniform') used in Brazilian jiu-jitsu was adapted from the uniform commonly used in Japanese martial arts. It is typically composed of a heavy cotton jacket and reinforced trousers. A cloth belt is worn over the gi, both to keep the jacket closed, and as a signifier of the skill/rank of the practitioner. The term ''kimono'' is sometimes used to describe the whole outfit, or occasionally just the jacket. ==General regulations== The only colors allowed for international championships are white, black or blue. In some jurisdictions this is relaxed to allow any single solid color. In many clubs it is customary for practitioners who are white belts to only wear a white gi, but once a blue belt is obtained they are free to wear any color. According to article 8 of IBJJF rules, a competition gi must conform to these specifications: * The gi must be constructed of cotton or similar material and be in good condition. The material may not be excessively thick or hard to the point where it will obstruct the opponent. * Colors may be black, white or blue, no combined colors (white kimono with blue pants, etc.) * The jacket is to be of sufficient length down to the thighs, sleeves must reach the wrist with arms extended in front of the body. The sleeve should follow the official measurements according to IBJJF (this is measured from the shoulder to the wrist). * Belt width must be 4–5 cm, with belt color corresponding to the practitioner's rank. The belt must be tied around the waist with a double knot, tight enough to secure the kimono closed. An extremely worn/discoloured belt may need to be replaced before competing. * Athletes are not permitted to compete with torn kimonos, sleeves or pants that are not of proper length, or with T-shirts underneath the kimono (except for females). * A BJJ practitioner is not allowed to paint his/her gi. Exceptions can be made for teams competition. In addition to the above requirements, pockets of any kind are not allowed in a gi used at tournaments.〔 A special gi checking tool is often used to determine acceptable measurements and fit of the gi. This tool resembles a block of wood 3.5 cm x 2.5 cm x 15 cm with a slit cut in the middle and is used to measure the following:〔 * The jacket lapel must be 5 cm wide. * There must be at least 7 cm of room from the bottom of the competitor's wrist to the bottom of the sleeve. * The jacket lapel must not be thicker than 1.3 cm. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Brazilian jiu-jitsu gi」の詳細全文を読む スポンサード リンク
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