Welcome to Kyokushin International Karate Organisation (KIKO)

About Us

About Kyokushin Karate



Kyokushin Karate is the most famous Full Contact Karate style of our time founded by the great Sosai 

Mas Oyama 10th Dan. The style has millions of people around the world karate training and teaching self defense classes. It is the 

largest single style of its time and it still maintains this record today.

Kyokushin Karate has created some of the biggest names of world-wide martial arts from 

Hanshi Steve Arneil, Soshu Shigeru Oyama, Kaicho Tadashi Nakamura, Kancho Hideyuki 

Ashihara, Kancho Yoshiji Soeno, Shihan Terutomo Yamazaki, Hanshi John Taylor, Shihan John Jarvis,

Shihan Howard Collins, Shihan Loek Hollander, Kancho Hatsuo Royama, Soshu Katsuaki Sato,

Kancho Shokei Matsui, Kancho Kenji Midori, just to name a few.

Our founder Sosai Masutatsu Oyama, was born on 27th July 1923, near Seoul in South Korea.

He is known to the world and our Style as “Sosai” Mas Oyama, Sosai meaning President.

He studied Chinese Kempo, at the age of 9. When he was 15, he moved to Japan to enter aviation

school. In Tokyo he became a pupil of Master Gichin Funakoshi, of Shotokan Karate. Such was his progress, that at 17 he was a 2nd Dan and by 24 he had achieved 4th Dan.  Young Oyama also studied with Master So Nei Chu of Goju Ryu.

He achieved 6th dan in Goju-ryu, and after establishing Kyokushin he eventually was awarded 10th Dan by the Kyokushinkaikan branch chiefs in the mid-1980s.

In 1946, he went to Mount Minobu and trained for 14 months. Then in 1947, when he emerged, he won the Karate section of the first Japan National Martial Arts tournament after WWII.

Following this, he decided to devote his life to Karate and develop his own Way, or “Do”, so he went into mountain seclusion once more (Mt. Kiyosumi). While there, he trained 12 hours per day, perfecting his skills, physical and spiritual, so that when he emerged 18 months later, he was ready for any challenge.

1950 he fought his first bull (all the bulls Mas Oyama fought were destined for the slaughter house). Altogether he fought 52 bulls, 3 dying instantly, and the others having their horns knocked off with a knife hand blow.

1951 saw Mas Oyama training Judo at Sone Dojo, Chiba. He maintained his Judo training for four years finishing with a 4th Dan.

In 1952 he travelled to America to demonstrate Karate to the Western world. He toured for a year, displaying Karate and accepting challenges from all comers (boxers, wrestlers, strong men etc…) In all the challengers he took on over the years, he was never defeated once, usually winning in the first minute of the fight, such was his strength and skill.

After returning to Japan, he started teaching in a grass lot in Tokyo and in 1956, opened a dojo behind Rikkyo University. This event marks the beginning of the Kyokushin karate as a formal organisation.

He was also a master of tameshiwari (test of breaking), inventing such breaks as the bottle break.

In his quest to make Kyokushin the strongest Karate, he also began the 100 man kumite tradition, where a person must fight 100 challengers in a row, all in the same day. Sosai Oyama did this on three consecutive days; “300 Fights.” In 1964 Oyama Dojo accepted a Muay Thai (kickboxing) challenge and sent 3 students to Thailand, winning 2 out of 3 fights.

Since 1975 Sosai Oyama and Kyokushinkai have staged the most successful Full Contact World Tournament every 4 years.

In 1977 Sosai Oyama visited Australia for the first time to attend the first Australian Full Contact Tournament, held at the Sydney Town Hall. He visited Australia on a number of other occasions.

Mas Oyama was married and had three daughters. Sadly Sosai Oyama passed away on the 26th April 1994 due to lung cancer, and was mourned by 12 million Kyokushin practitioners worldwide.

His wife Chiyako joined him in 2006, and his oldest daughter died in a car crash. The youngest daughter, Kuristina, now manages his legacy.

About Us

Sosai Mas Oyama (1923 – 1994)



Our karate master who founded Kyokushin Karate, considered the first and most influential

style of full contact karate. A Zainichi Korean, he spent most of his life living in Japan and

acquired Japanese citizenship in 1964. He was an alumnus of Waseda University.

Early life Oyama was born as Choi Young-Eui (최영의) in Gimje, South Korea, during Japanese


At a young age he was sent to Manchuria, Northeast China to live on his sister’s farm.

Oyama began studying Chinese martial arts at age 9 from a Chinese farmer who was working

on the farm. His family name was Lee and Oyama said he was his very first teacher. The story

of the young Oyama’s life is written in his earlier books.

In March 1938, Oyama left for Japan following his brother who enrolled in the Yamanashi

Aviation School Imperial Japanese Army aviation school. Sometime during his time in Japan, Choi Young-Eui chose his Japanese name, Oyama Masutatsu (大山 倍達), which is a transliteration of Baedal (倍達). Baedal was an ancient Korean kingdom known in Japan during Oyama’s time as “Ancient Joseon”.

One story of Oyama’s youth involves Lee giving young Oyama a seed which he was to plant; when it

sprouted, he was to jump over it one hundred times every day. As the seed grew and became a plant, Oyama later said, “I was able to jump between walls back and forth easily.” The writer, Ikki Kajiwara, and the publisher of the comics based the story on the life experience Oyama spoke to them about – thus the title became “Karate Baka Ichidai” (Karate Fanatic).

In 1963, Oyama wrote What is Karate which became a best seller in the US and sold million copies all over the world. It is still considered by many to be the “Bible” of Karate to this day. It was translated into Hungarian, French, and English.

Post-World War II
In 1945 after the war ended, Oyama left the aviation school. He began “Eiwa Karate Research Center” in Suginami ward but closed it quickly because “I soon realized that I was an unwanted Korean. Nobody would rent me a room.” He finally found a place to live in Tokyo. This is where he met his future wife whose mother ran a dormitory for university students.

In 1946, Oyama enrolled in Waseda University School of Education to study sports science.

Wanting the best in instruction, he contacted the Shotokan dojo (Karate school) operated by Gigō Funakoshi, the second son of karate master and Shotokan founder Gichin Funakoshi.[7] He became a student, and began his lifelong career in Karate. Feeling like a foreigner in a strange land, he remained isolated and trained in solitude.

Oyama attended Takushoku University in Tokyo and was accepted as a student at the dojo of Gichin Funakoshi. He trained with Funakoshi for two years, then studied Gōjū-ryū karate for several years with So Nei Chu (조영주/ 曺(曹)寧柱, 1908–1995),] a senior student of the system’s founder, Chojun Miyagi. So was a fellow Korean from Oyama’s native province.

Korea had been officially annexed by Japan since 1910. During World War II (1939–1945) there was much unrest throughout Korea. As South Korea began to fight against North Korea over political ideology, Oyama became increasingly distressed. He recounts, “though I was born and bred in Korea, I had unconsciously made myself liberal; I felt repulsion against the strong feudal system of my fatherland, and that was one of the reasons which made me run away from home to Japan.” He joined a Korean political organization in Japan to strive for the unification of Korea, but soon was being targeted and harassed by the Japanese police. He then consulted with Mr. So.

Around the time he also went around Tokyo getting in fights with the U.S. Military Police. He later reminisced those times in a television interview, “Itsumitemo Haran Banjyo” (Nihon Television), “I lost many friends during the war- the very morning of their departure as Kamikaze pilots, we had breakfast together and in the evening their seats were empty. After the war ended, I was angry- so I fought as many U.S. military as I could, until my portrait was all over the police station.” At this time, Mr. So suggested that Oyama retreat to a lone mountain for solace to train his mind and body. He set out to spend three years on Mt. Minobu in Yamanashi Prefecture, Japan. Oyama built a shack on the side of the mountain. One of his students named Yashiro accompanied him, but after the rigors of this isolated training, with no modern conveniences, the student snuck away one night, and left Oyama alone. With only monthly visits from a friend in the town of Tateyama in Chiba Prefecture, the loneliness and harsh training became grueling. Oyama began to doubt his decision, so he sent a letter to the man who suggested the retreat. Mr. So replied with encouragement to remain, and suggested that he shave off one eyebrow so that he would not be tempted to come out of the mountain and let anyone see him that way. Oyama remained on the mountain for fourteen months, and returned to Tokyo a much stronger and fiercer Karateka.

Oyama gave great credit to reading The Book of Five Rings by Miyamoto Musashi, a famous Japanese swordsman, to change his life completely. He recounts this book as being his only reading material during his mountain training years.

He was forced to leave his mountain retreat after his sponsor had stopped supporting him. Months later, after he had won the Karate Section of Japanese National Martial Arts Championships, he was distraught that he had not reached his original goal to train in the mountains for three years, so he went into solitude again, this time on Mt. Kiyosumi in Chiba Prefecture, Japan and he trained there for 18 months.

Founding Kyokushin
In 1953 Oyama opened his own karate dojo, named Oyama Dojo (form of Gōjū-ryū), in Tokyo but continued to travel around Japan and the world giving martial arts demonstrations, including the fighting and killing of live bulls with his bare hands (sometimes grabbing them by the horn, and snapping the horn off). His dojo was first located outside in an empty lot but eventually moved into a ballet school in 1956. The senior instructors under him were T. Nakamura, K. Mizushima, E. Yasuda, M. ishibashi, and T. Minamimoto. Oyama’s own curriculum soon developed a reputation as a tough, intense, hard-hitting but practical style which was finally named Kyokushinkai (Japan Karate-Do Kyokushinkai), which means ‘the ultimate truth,’ in a ceremony in 1957. He also developed a reputation for being ‘rough’ with his students, as the training sessions were grueling and students injuring themselves in practice fighting (kumite) was quite common. Along with practice fighting that distinguished Oyama’s teaching style from other karate schools, emphasis on breaking objects such as boards, tiles, or bricks to measure one’s offensive ability became Kyokushin’s trademark. Oyama believed in the practical application of karate and declared that ignoring ‘breaking practice is no more useful than a fruit tree that bears no fruit. As the reputation of the dojo grew students were attracted to come to train there from inside and outside Japan and the number of students grew. Many of the eventual senior leaders of today’s various Kyokushin based organisations began training in the style during this time. In 1964 Oyama moved the dojo into the building that would from then on serve as the Kyokushin home dojo and world headquarters. In connection with this he also formally founded the ‘International Karate Organization Kyokushin kaikan’ (commonly abbreviated to IKO or IKOK) to organise the many schools that were by then teaching the kyokushin style.

In 1961 at the All-Japan Student Open Karate Championship, one of Oyama’s students, Tadashi Nakamura, at 19 years old (1961)made his first tournament appearance, where he was placed first. Nakamura later became Mas Oyama’s Chief Instructor as referenced in Mas Oyama’s book, “This is Karate.” In 1969, Oyama staged the first All-Japan Full Contact Karate Open Championships which took Japan by storm and Terutomo Yamazaki became the first champion, which have been held every year since. In 1975, the first World Full Contact Karate Open Championships were held in Tokyo. World championships have been held at four-yearly intervals since. After formally establishing Kyokushin-kai, Oyama directed the organization through a period of expansion. Oyama and his staff of hand-picked instructors displayed great ability in marketing the style and gaining new members. Oyama would choose an instructor to open a dojo in another town or city in Japan, whereupon the instructor would move to that town, and, typically demonstrate his karate skills in public places, such as at the civic gymnasium, the local police gym (where many judo students would practice), a local park, or conduct martial arts demonstrations at local festivals or school events. In this way, the instructor would soon gain a few students for his new dojo. After that, word of mouth would spread through the local area until the dojo had a dedicated core of students. Oyama also sent instructors to other countries such as the United States, Netherlands, England, Australia and

Brazil to spread Kyokushin in the same way. Oyama also promoted Kyokushin by holding The All-Japan Full Contact Karate Open Championships every year and World Full Contact Karate Open Championships once every four years in which anyone could enter from any style.

Public demonstrations
Oyama tested himself in a kumite, a progression of fights, each lasting two minutes, and each after the featured participant wins. Oyama devised the 100-man kumite which he went on to complete three times in a row over the course of three days.

He was also known for fighting bulls bare-handed. In his lifetime, he battled 52 bulls, three of which were purportedly killed instantly with one strike, earning him the nickname of “Godhand”.

Oyama had many matches with professional wrestlers during his travels through the United States. Oyama said in the 1958 edition of his book What Is Karate that he had just three matches with professional wrestlers plus thirty exhibitions and nine television appearances.

Later years
In 1946, Oyama married a Japanese woman, Oyako Chiako (1926-2006) and had three children with her. In the late 1960s, Oyama and Chiako were having marital problems and decided to separate, and Chiako, who did not want her husband to start seeing other women, arranged for a Korean woman and family friend named Sun-ho Hong to become Oyama’s companion for some time. With Hong, Oyama had three more children and he would remain romantically involved with both Hong and Chiako until the end of his life.

Later in life, Oyama suffered from osteoarthritis. Despite his illness, he never gave up training. He held demonstrations of his karate, which included breaking objects.

Oyama wrote over 80 books in Japanese and some were translated into other languages.

Final years
Before dying, Oyama built his Tokyo-based International Karate Organization, Kyokushinkaikan, into one of the world’s foremost martial arts associations, with branches in more than 100 countries boasting over 12 million registered members. In Japan, books were written by and about him, feature-length films splashed his colorful life across the big screen, and comic books recounted his many adventures.

Oyama died at the age of 70, on Tokyo, Japan, April 26, 1994, of lung cancer, despite never being a smoker in any point in his life.

His widow Chiyako Oyama, made a trust foundation to honor his lifelong work.

11 Mottoes Of Sosai the Founder of Kyokushin Karate

Sosai Mas Oyamas’ Eleven Mottoes


  • The Martial Way begins and ends with courtesy. ​Therefore, be properly and genuinely courteous at all times.
  • Following the Martial Way is like scaling a cliff – continue upwards without rest. It demands absolute and unfaltering devotion to the task at hand.
  • Strive to seize the initiative in all things, all the time guarding against actions stemming from selfish animosity or thoughtlessness.
  • Even for the Martial Artist, the place of money cannot be ignored. Yet one should be careful never to become attached to it.
  • The Martial Way is centred in posture. Strive to maintain correct posture at all times.
  • The Martial Way begins with one thousand days and is mastered after ten thousand days of training.
  • In the Martial Arts, introspection begets wisdom. Always see contemplation on your action as an opportunity to improve.
  • The nature and purpose of the Martial Way is universal. All selfish desires should be roasted in the tempering fires of hard training.
  • The Martial Arts begin with a point and end in a circle. Straight lines stem from this principle.
  • The true essence of the Martial Way can only be realized through experience. Knowing this, learn never to fear its demands.
  • Always remember: In the Martial Arts, the rewards of a confident and grateful heart are truly abundant.