Aikidos fundamental principles include: irimi[7] (entering), atemi,[8][9] kokyu-ho (breathing control), sankaku-ho (triangular principle), and tenkan (turning) movements which redirect the opponent's attack momentum. Its curriculum comprises various techniques, primarily throws and joint locks.[10] It includes a weapons system encompassing the bokken, tantō, and jō. Aikido derives mainly from the martial art of Daitō-ryū Aiki-jūjutsu, but began to diverge from it in the late 1920s, partly due to Ueshiba's involvement with the Ōmoto-kyō religion. Ueshiba's early students' documents bear the term aiki-jūjutsu.[11]
Ueshiba's senior students have different approaches to aikido, depending partly on when they studied with him. Today, aikido is found all over the world in a number of styles, with broad ranges of interpretation and emphasis. However they all share techniques formulated by Ueshiba and most have concern for the well-being of the attacker.
The term dō in Aikido is found in many other Japanese martial arts such as, judo and kendo, and in various non-martial arts, such as Japanese calligraphy (shodō), flower arranging (kadō) and tea ceremony (chadō or sadō). Therefore, from a purely literal interpretation, aikido is the "Way of combining forces" or "Way of unifying energy", in which the term aiki refers to the martial arts principle or tactic of blending with an attacker's movements for the purpose of controlling their actions with minimal effort.[12] One applies aiki by understanding the rhythm and intent of the attacker to find the optimal position and timing to apply a counter-technique.
The art of Daitō-ryū is the primary technical influence on aikido. Along with empty-handed throwing and joint-locking techniques, Ueshiba incorporated training movements with weapons, such as those for the spear (yari), short staff (jō), and possibly the bayonet (銃剣, jūken). Aikido also derives much of its technical structure from the art of swordsmanship (kenjutsu).[4][17] Ueshiba moved to Hokkaidō in 1912, and began studying under Takeda Sokaku in 1915; His official association with Daitō-ryū continued until 1937.[15] However, during the latter part of that period, Ueshiba had already begun to distance himself from Takeda and the Daitō-ryū. At that time Ueshiba referred to his martial art as "Aiki Budō". It is unclear exactly when Ueshiba began using the name "aikido", but it became the official name of the art in 1942 when the Greater Japan Martial Virtue Society (Dai Nippon Butoku Kai) was engaged in a government sponsored reorganization and centralization of Japanese martial arts.[10]
After Ueshiba left Hokkaidō in 1919, he met and was profoundly influenced by Onisaburo Deguchi, the spiritual leader of the Ōmoto-kyō religion (a neo-Shinto movement) in Ayabe.[18] One of the primary features of Ōmoto-kyō is its emphasis on the attainment of utopia during one's life. The idea was a great influence on Ueshiba's martial arts philosophy of extending love and compassion especially to those who seek to harm others. Aikido demonstrates this philosophy in its emphasis on mastering martial arts so that one may receive an attack and harmlessly redirect it. In an ideal resolution, not only is the receiver unharmed, but so is the attacker.[19] In addition to the effect on his spiritual growth, the connection with Deguchi gave Ueshiba entry to elite political and military circles as a martial artist. As a result of the exposure, he was able to attract not only financial backing but also gifted students. Several of the students went on to begin their own styles of aikido.[20]
Aikido was first introduced to the rest of the world in 1951 by Minoru Mochizuki with a visit to France, where he demonstrated aikido techniques to judo students.[21] He was followed by Tadashi Abe in 1952, who came as the official Aikikai Hombu representative, remaining in France for seven years. Kenji Tomiki toured with a delegation of various martial arts through 15 continental states of the United States in 1953.[20][22] Later in the same year, Koichi Tohei was sent by Aikikai Hombu to Hawaii for a full year, where he set up several dōjō. The trip was followed by several visits and is considered the formal introduction of aikido to the United States. The United Kingdom followed in 1955; Italy in 1964 by Hiroshi Tada; and Germany in 1965 by Katsuaki Asai. Designated the "Official Delegate for Europe and Africa" by Morihei Ueshiba, Masamichi Noro arrived in France in September 1961. Seiichi Sugano was appointed to introduce aikido to Australia in 1965. Today there are aikido dōjō throughout the world. Steven Seagal's film debut Above the Law (1988) is regarded as the first American film to feature aikido in fight sequences.[23][24]
The largest aikido organization is the Aikikai Foundation, which remains under the control of the Ueshiba family. However, aikido has developed into many styles, most of which were formed by Morihei Ueshiba's major students.[20] The earliest independent styles to emerge were Yoseikan Aikido, begun by Minoru Mochizuki in 1931,[21] Yoshinkan Aikido, founded by Gozo Shioda in 1955,[25] and Shodokan Aikido, founded by Kenji Tomiki in 1967.[26] The emergence of these styles pre-dated Ueshiba's death and did not cause any major upheavals when they were formalized. Shodokan Aikido, however, was controversial, since it introduced a unique rule-based competition that some felt was contrary to the spirit of aikido.[20]
After Ueshiba's death in 1969, two more major styles emerged. Significant controversy arose with the departure of the Aikikai Hombu Dojo's chief instructor Koichi Tohei, in 1974. Tohei left as a result of a disagreement with the son of the founder, Kisshomaru Ueshiba, who at that time headed the Aikikai Foundation. The disagreement was over the proper role of ki development in regular aikido training. After Tohei left, he formed his own style, called Shin Shin Toitsu Aikido, and the organization that governs it, the Ki Society (Ki no Kenkyūkai).[27] A final major style evolved from Ueshiba's retirement in Iwama, Ibaraki and the teaching methodology of long term student Morihiro Saito. It is unofficially referred to as the "Iwama style", and at one point a number of its followers formed a loose network of schools they called Iwama Ryu. Although Iwama style practitioners remained part of the Aikikai until Saito's death in 2002, followers of Saito subsequently split into two groups. One remained with the Aikikai and the other formed the independent Shinshin Aikishuren Kai in 2004 around Saito's son Hitohiro Saito.
The character for ki is used in everyday Japanese terms, such as "health" (元気, genki), or "shyness" (内気, uchiki). Ki has many meanings, including "ambience", "mind", "mood", or "intention and action", however, in traditional martial arts and medicine it is often referred to in its more general terminology as "life energy". Gozo Shioda's Yoshinkan Aikido, considered one of the "hard styles", largely follows Ueshiba's teachings from before World War II, and surmises that the secret to ki lies in timing and the application of the whole body's strength to a single point.[28] In later years, Ueshiba's application of ki in aikido took on a softer, more gentle feel. The concept was known as Takemusu Aiki, and many of his later students teach about ki from this perspective. Koichi Tohei's Ki Society centers almost exclusively around the study of the empirical (albeit subjective) experience of ki, with students' proficiency in aikido techniques and ki development ranked separately.[29]
In aikido, as in virtually all Japanese martial arts, there are both physical and mental aspects of training. The physical training in aikido is diverse, covering both general physical fitness and conditioning, as well as specific techniques.[30] Because a substantial portion of any aikido curriculum consists of throws, beginners learn how to safely fall or roll.[30] The specific techniques for attack include both strikes and grabs; the techniques for defense consist of throws and pins. After basic techniques are learned, students study freestyle defense against multiple opponents, and techniques with weapons.
Physical training goals pursued in conjunction with aikido include controlled relaxation, correct movement of joints such as hips and shoulders, flexibility, and endurance, with less emphasis on strength training. In aikido, pushing or extending movements are much more common than pulling or contracting movements. This distinction can be applied to general fitness goals for the aikido practitioner.[4] In aikido, specific muscles or muscle groups are not isolated and worked to improve tone, mass, or power. Aikido-related training emphasizes the use of coordinated whole-body movement and balance similar to yoga or pilates. For example, many dōjōs begin each class with warm-up exercises (準備体操, junbi taisō), which may include stretching and ukemi (break falls).[31]
Aikido techniques are usually a defense against an attack, so students must learn to deliver various types of attacks to be able to practice aikido with a partner. Although attacks are not studied as thoroughly as in striking-based arts, attacks with intent (such as a strong strike or an immobilizing grab) are needed to study correct and effective application of technique.[4] Many of the strikes (打ち, uchi) of aikido resemble cuts from a sword or other grasped object, which indicate its origins in techniques intended for armed combat.[4] Other techniques which explicitly appear to be punches (tsuki), are practiced as thrusts with a knife or sword. Kicks are generally reserved for upper-level variations; reasons cited include that falls from kicks are especially dangerous, and that kicks (high kicks in particular) were uncommon during the types of combat prevalent in feudal Japan.
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