Sosai oyama was created his self defense technique inspired of the "goshin jutsu" that significat "self defense jutsu ", he was choose the daito school, daito goshin jutsu.
Sosai oyama teached this technique during his life, but during the 80's years he develloped more in the fight competition side, more populary, it's for that today kyokushin is a lot of based on the competition.
Some school practice self defense kyokushin, but in generaly, it is unfortunately forget.
we will get see the story of daito goshin jutsu and understand why oyama choosed this self defense technique:
Daitō-ryū Aiki-jūjutsu (大東流合気柔術?), originally called Daitō-ryū Jujutsu (大東流柔術 Daitō-ryū Jūjutsu), is a Japanese martial art that first became widely known in the early 20th century under the headmastership of Takeda Sōkaku. Takeda had extensive training in several martial arts (including Kashima Shinden Jikishinkage-ryū and sumo) and referred to the style he taught as "Daitō-ryū" (literally, "Great School"). Although the school's traditions claim to extend back centuries in Japanese history there are no known extant records regarding the ryū before Takeda. Whether Takeda is regarded as either the restorer or the founder of the art, the known history of Daitō-ryū begins with him. Takeda's best-known student was Morihei Ueshiba, the founder of aikido.
he origins of Daitō-ryū maintain a supposed lineage extending approximately 900 years, originating with Shinra Saburō Minamoto no Yoshimitsu (新羅 三郎 源 義光, 1045–1127), who was a Minamoto clan samurai and member of the Seiwa Genji (the branch of the Minamoto family descended from the 56th imperial ruler of Japan, Emperor Seiwa). Daitō-ryū takes its name from the mansion that Yoshimitsu lived in as a child, called "Daitō" (大東?), in Ōmi Province (modern day Shiga Prefecture). According to legend, Yoshimitsu dissected the corpses of men killed in battle, studying their anTatomy for the purpose of learning techniques for joint-locking and vital point striking (kyūsho-jitsu).
Yoshimitsu had previously studied the empty-handed martial art of tegoi, an ancestor of the Japanese national sport of sumo, and added what he learned to the art. He eventually settled down in Kai Province (modern day Yamanashi Prefecture), and passed on what he learned within his family. Ultimately, Yoshimitsu's great-grandson Nobuyoshi adopted the surname "Takeda", which has been the name of the family to the present day. The Takeda family remained in Kai Province until the time of Takeda Shingen (武田 信玄, 1521–1573). Shingen opposed Tokugawa Ieyasu and Oda Nobunaga in their campaign to unify and control all of Japan. With the death of Shingen and his heir, Takeda Katsuyori (武田 勝頼, 1546–1582), the Takeda family relocated to the Aizu domain (an area comprising the western third of modern-day Fukushima Prefecture).
Though these events caused the Takeda family to lose some of its power and influence, it remained intertwined with the ruling class of Japan. More importantly, the move to Aizu and subsequent events profoundly shaped what would emerge as Daitō-ryū Aiki-jūjutsu in the 19th century. One important event was the adoption of Tokugawa Ieyasu's grandson, Komatsumaru (1611–1673), by Takeda Kenshoin (fourth daughter of Takeda Shingen). Komatsumaru devoted himself to the study of the Takeda family's martial arts, and was subsequently adopted by Hoshina Masamitsu. Komatsumaru changed his name to Hoshina Masayuki (保科 正之), and in 1644 was appointed the governor of Aizu. As governor, he mandated that all subsequent rulers of Aizu study the arts of Ono-ha Ittō-ryū (which he himself had mastered), as well as the art of oshikiuchi, a martial art which he developed for shogunal counselors and retainers, tailored to conditions within the palace. These arts became incorporated into and comingled with the Takeda family martial arts.
According to the traditions of Daitō-ryū, it was these arts which Takeda Sokaku began teaching to non-members of the family in the late 19th century. Takeda had also studied swordsmanship and spearmanship with his father, Takeda Sokichi, as well as Kashima Shinden Jikishinkage-ryū as an uchi-deshi (live-in student) under the renowned swordsman Sakakibara Kenkichi. During his life, Sokaku traveled extensively to attain his goal of preserving his family's traditions by spreading Daitō-ryū throughout Japan.
Takeda Sokaku's third son, Tokimune Takeda (武田 時宗 Takeda Tokimune, 1916–1993), became the headmaster of the art following Sokaku's death in 1943. Tokimune taught what he called "Daitō-ryū Aikibudō" (大東流合気武道), an art that included the sword techniques of the Ono-ha Ittō-ryū along with the traditional techniques of Daitō-ryū Aiki-jūjutsu. It was also under Tokimune's headmastership that modern dan rankings were first created and awarded to the students of Daitō-ryū. Tokimune Takeda died in 1993 leaving no official successor, but a few of his high-ranking students, such as Katsuyuki Kondo (近藤 勝之 Kondō Katsuyuki, 1945–) and Shigemitsu Kato, now head their own Daitō-ryū Aiki-jūjutsu organizations.
Aiki-jūjutsu can be broken into three styles: jujutsu (hard); aiki no jutsu (soft); and the combined aikijujutsu (hard/soft). Modern Japanese jujutsu and aikido both originated in aikijujutsu, which emphasizes "an early neutralization of an attack". Like other forms of jujutsu, it emphasizes throwing techniques and joint manipulations to effectively subdue or injure an attacker. Of particular importance is the timing of a defensive technique either to blend or to neutralize an attack's effectiveness and to use the force of the attacker's movement against him. Daitō-ryū is characterized by ample use of atemi, or the striking of vital areas, to set up jointlocking or throwing tactics.
Some of the art's striking methods employ the swinging of the outstretched arms to create power and to hit with the fists at deceptive angles, as may be observed in techniques such as the atemi that sets up gyaku ude-dori (reverse elbow lock). Tokimune Takeda regarded one of the unique characteristics of the art to be its preference for controlling a downed attacker's joints with one's knee to leave one's hands free to access weapons or to deal with the threat of other attackers.
Currently, there are a number of organizations that teach Daitō-ryū, each tracing their lineage back to Takeda Sokaku through one of four of his students. Those four students are: Takeda Tokimune, the progenitor of the Tokimune branch; Takuma Hisa (久 琢磨 Hisa Takuma, 1895–1980), of the Hisa branch; Kōdō Horikawa (堀川 幸道 Horikawa Kōdō, 1894–1980), of the Horikawa branch; and Yukiyoshi Sagawa (Sagawa Yukiyoshi, 1902–1998), of the Sagawa branch.
The Tokimune branch descends from the teachings of Tokimune Takeda, the son of Takeda Sokaku, and designated successor of Daitō-ryū upon the father's death. When Tokimune died, he had not appointed a successor; there are two main groups that carry on his teachings.
The first group is led by Katsuyuki Kondō, who began his training under Tsunejiro Hosono and continued training under Kōtarō Yoshida (吉田 幸太郎 Yoshida Kōtarō, 1883–1966) for a time, before being introduced to Tokimune. On the basis of the high level teaching licenses Kondo was granted by Tokimune, his followers represent his school as the Daitō-ryū "mainline". He has much support in the martial arts community for this. Kondo has done much to increase the visibility of the art by hosting seminars both in Tokyo and abroad, especially in Europe and the United States. In the last years four Branches were created in Europe, thanks to four Kondo Sensei's students that achieved the San Dan (3° Dan) level necessary to confer to the study group the "Branch" status: Alex Muracchini and Luca Canovi from Italy, Niels van Willigen from Netherlands and Evgeny Bodrenko from Russia. In the USA there are also several Branch dojos such as Derek Steel in Philadelphia, Mark Sumi in Los Angeles and Jose Garrido in the New York City Metro area. Along with four more Study Groups.
The second group from the Tokimune branch is headed by Shigemitsu Kato and Gunpachi Arisawa, who are long-time students and teachers from Tokimune's original Daitokan headquarters in Hokkaidō. This organization is called the Nihon Daito Ryu Aikibudo Daito Kai (日本大東流合気武道大東会 Nihon Daitō-ryū Aikibudō Daitō Kai). They maintain a smaller organization in Hokkaidō, with strong connections to practitioners in Europe (especially Italy), the United States, and Brazil.
The Asahi Newspaper office in Osaka, Japan, where many Daitō-ryū techniques were preserved on film as originally taught by both Morihei Ueshiba and Takeda Sōkaku
The second major branch of Daitō-ryū is represented by students of Takuma Hisa. His students banded together and founded the Takumakai (琢磨会?). They have a wealth of materials in the form of film and still photographs, taken at the Asahi Newspaper dojo, recording the Daitō-ryū techniques taught to them, first by Morihei Ueshiba and then later by Takeda Sokaku directly. One of their major training manuals, called the Sōden, features techniques taught to them by both masters.
The Takumakai represents the second largest aiki-jūjutsu organization. The current director is Mori Hakaru assisted by honorary director is Chiba Tsugutaka, and the manager is Kobayashi Kiyohiro. Chiba Tsugutaka, who proposed the idea of naming the organization "Takumakai", also spent some time training at the Daito-kan in Hokkaido under Takeda Tokimune.
In the 1980s, led by Shogen Okabayashi (Okabayashi Shogen, born 1949), who was sent by the elderly Hisa to train under the headmaster, the Takumakai made a move to implement the forms for teaching the fundamentals of the art as originally established by Tokimune Takeda. This move upset some preservers of Hisa's original teaching method, leading to the formation of a new organization called the Daibukan, founded by a long term student of Hisa, Kenkichi Ohgami (Ōgami Kenkichi, born 1936). Later, in order to implement greater changes to the curriculum, Okabayashi himself chose to separate from the Takumakai and formed the Hakuho-ryu.
The Horikawa branch descends from the teachings of Kōdō Horikawa, who is regarded as a talented innovator in the art. citation needed] A few organizations have been formed based on his teachings.
The Kodokai (幸道会 Kōdōkai) was founded by students of Horikawa, whose distinctive interpretation of aiki movements can be seen in the movements of his students. The Kodokai is located in Hokkaidō and is headed by Yusuke Inoue (Inoue Yasuke, born 1932). Both Inoue's father and his main teacher, Horikawa, were direct students of Takeda Sokaku. Inoue received his teaching license (Menkyo Kaiden) in accordance with Horikawa's final wishes.
There are two major teachers who branched off from the Kodokai to establish their own traditions. The first was Seigō Okamoto (岡本 正剛 Okamoto Seigō, 1925-2015) who founded the Daito-ryu Aikijujutsu Roppokai (大東流合気柔術六方会 Daitō-ryū Aiki-jūjutsu Roppōkai). His interpretation of aiki and minimal movement throws have proved very popular. The organization has a great following abroad, especially in the United States and Europe. The other group was that of Katsumi Yonezawa (米沢 克巳 Yonezawa Katsumi, 1937–1998), who founded his own organization, called the Bokuyōkan (牧羊館?). In the early 1970s, while Yonezawa was still a senior teacher at the Kodokai, he was the first person to bring Daitō-ryū Aiki-jūjutsu to the United States and Canada. The Bokuyōkan is currently run by his son Hiromitsu Yonezawa (Yonezawa Hiromitsu), headquartered in Hokkaidō, with a following at the Yonezawa dojo and several branches in the United States, as well as a dojo in Germany.
The University of Tsukuba, where members of the Sagawa branch teach aiki-jūjutsu, today.
The last major group consists of students of Yukiyoshi Sagawa (佐川 幸義, Sagawa Yukiyoshi, 1902–1998), who was once considered to be the successor to Takeda Sokaku (should Tokimune not have survived World War II). Sagawa ran only a single dojo and taught a relatively small number of students. He began studying Daitō-ryū under Takeda Sokaku in 1914 after first learning the art from his father, Sagawa Nenokichi (1867–1950), who was also a student of Sokaku and a holder of a Kyōju Dairi (teaching license) in the system. Although considered by many to be one of the most accomplished students of Sokaku, Yukiyoshi Sagawa received the kyoju dairi in 1932—but did not receive the menkyo kaiden (certificate of mastery) of the system's secrets, as during the time he practised under Takeda Sokaku, the highest licence was not the menkyo kaiden. Sagawa often served as a teaching assistant to Takeda and traveled with him to various locations in Japan teaching Daito-ryu. He further developed the art of applying Aiki and is said to have remained powerful until very late in life, and – as a consequence of the success of Transparent Power – was featured in a series of articles in the Aiki News magazines prior to his death in 1998.
Tatsuo Kimura (木村 達雄 Kimura Tatsuo, born 1947), a former mathematics professor at the University of Tsukuba and a senior student of Sagawa, ran a small aiki-jūjutsu study group at that institution. He retired from his professorship there in June 2013, and has retired from public instruction of Daito Ryu. He now privately instructs a small group of students. He has written two books about his training under Sagawa: Transparent Power and Discovering Aiki