The term "aiki" does not readily appear in the Japanese language outside the scope of Budo. This has led to many possible interpretations of the word. is mainly used in compounds to mean 'combine, unite, join together, meet', examples being 合同 (combined/united), 合成 (composition), 結合 (unite/combine/join together), 連合 (union/alliance/association), 統合 (combine/unify), and 合意 (mutual agreement). There is an idea of reciprocity, 知り合う (to get to know one another), 話し合い (talk/discussion/negotiation), and 待ち合わせる (meet by appointment).

is often used to describe a feeling, as in なになに気がする ('I feel X', as in terms of thinking but with less cognitive reasoning), and 気持ち (feeling/sensation); it is used to mean energy or force, as in 電気 (electricity) and 磁気 (magnetism); it can also refer to qualities or aspects of people or things, as in 気質 (spirit/trait/temperament).

The term is also found in martial arts such as judo and kendo, and in the more peaceful arts such as Japanese calligraphy (shodō), flower arranging (kadō) and tea ceremony (chadō or sadō).

Therefore, from a purely linguistic point of view, aikido is 'Way of combining forces'. 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.[7] One applies aiki by understanding the rhythm and intent of the attacker to find the optimal position and timing to apply a counter-technique. This then is very similar to the principles expressed by Kanō Jigorō, founder of judo.

History

Aikido was created by Morihei Ueshiba (植芝 盛平 Ueshiba Morihei, 14 December 1883 – 26 April 1969), referred to by some aikido practitioners as Ōsensei ("Great Teacher"). The term 'aikido' is a generic term coined in the twentieth century. Ueshiba envisioned aikido not only as the synthesis of his martial training, but as an expression of his personal philosophy of universal peace and reconciliation. During Ueshiba's lifetime and continuing today, aikido has evolved from the Aiki that Ueshiba studied into a wide variety of expressions by martial artists throughout the world.

Initial development

 Ueshiba developed aikido primarily during the late 1920s through the 1930s through the synthesis of the older martial arts that he had studied.The core martial art from which aikido derives is Daitō-ryū aiki-jūjutsu, which Ueshiba studied directly with Takeda Sōkaku, the reviver of that art. Additionally, Ueshiba is known to have studied Tenjin Shin'yō-ryū with Tozawa Tokusaburō in Tokyo in 1901, Gotōha Yagyū Shingan-ryū under Nakai Masakatsu in Sakai from 1903 to 1908, and judo with Kiyoichi Takagi (高木 喜代子 Takagi Kiyoichi, 1894–1972) in Tanabe in 1911.

 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 (), and perhaps the bayonet (銃剣 jūken). However, aikido derives much of its technical structure from the art of swordsmanship (kenjutsu).[2]

 Ueshiba moved to Hokkaidō in 1912, and began studying under Takeda Sokaku in 1915. His official association with Daitō-ryū continued until 1937. 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 was referring 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.

International dissemination

 Aikido was first brought to the rest of the world in 1951 by Minoru Mochizuki with a visit to France where he introduced aikido techniques to judo students. 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. Later in that year, Koichi Tohei was sent by Aikikai Hombu to Hawaii, for a full year, where he set up several dojo. This was followed up by several further 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 1965 by Katsuaki Asai. Designated "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 dojo available throughout the world.

 Proliferation of independent organizations

The largest aikido organization is the Aikikai Foundation, which remains under the control of the Ueshiba family. However, aikido has many styles, mostly formed by Morihei Ueshiba's major students.

 The earliest independent styles to emerge were Yoseikan Aikido, begun by Minoru Mochizuki in 1931, Yoshinkan Aikido founded by Gozo Shioda in 1955, and Shodokan Aikido, founded by Kenji Tomiki in 1967. 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.

 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 which governs it, the Ki Society (Ki no Kenkyūkai).

 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 remaining with the Aikikai and the other forming the independent Shinshin Aikishuren Kai in 2004 around Saito's son Hitohiro Saito.

 Today, the major styles of aikido are each run by a separate governing organization, have their own headquarters (本部道場 honbu dōjō) in Japan, and have an international breadth.