Editing Masutatsu Oyama

{| class="wikitable" style="float:right; width:280px; margin:0 0 1em 1em;"
|+ '''Masutatsu Oyama'''
|-
| colspan="2" style="text-align:center;" | [[File:Mas_oyama.jpg|250px]]
|-
! Birth name
| Choi Yeong-eui
|-
! Born
| July 27, 1923<br />Korea
|-
! Died
| April 26, 1994<br />Tokyo, Japan
|-
! Other names
| Mas Oyama<br />Sosai Mas Oyama
|-
! Nationality
| Korean-Japanese
|-
! Style
| [[Kyokushin]]
|-
! Teachers
| [[Gichin Funakoshi]]<br />Nei-chu So
|-
! Rank
| 10th dan
|-
! Organization
| [[International Karate Organization]] (IKO)
|-
! Notable students
| [[Peter Chong]]<br />Tadashi Nakamura<br />Hatsuo Royama
|}

'''Masutatsu Oyama''' (born '''Choi Yeong-eui'''; July 27, 1923 – April 26, 1994), widely known as '''Mas Oyama''' and '''Sosai Mas Oyama''', was a Korean-Japanese karate master and the founder of [[Kyokushin]], one of the most influential styles of full-contact karate.

== Early life ==
Oyama was born in Korea in 1923 and spent part of his youth in Manchuria, where he began studying Chinese martial arts before moving to Japan.

== Training ==
After arriving in Japan, he trained in karate under [[Gichin Funakoshi]] and later continued his development under Nei-chu So. These early influences helped shape both the technical and philosophical foundations of his later system.

== Ascetic training ==
Following World War II, Oyama devoted himself intensely to martial arts training and personal discipline. He became known for periods of isolated mountain training, including time associated with Mount Minobu and later further solitary practice, which became part of his public legacy as a karate master defined by endurance and self-mastery.

== Founding of Kyokushin ==
In the 1950s, Oyama opened his own dojo in Tokyo and gradually developed a hard, practical style of karate that emphasized conditioning, full-contact training, and breaking techniques. His method became known as Kyokushin, a name commonly translated as “ultimate truth.”

In 1964, the Tokyo Honbu was officially opened and the International Karate Organization Kyokushinkaikan was established. This marked the formal beginning of Kyokushin as an organized international karate movement.

== Teaching philosophy ==
Oyama taught that karate should be proven through direct practice, not only through theory or formal movement. Kyokushin training under his leadership emphasized kihon, kata, kumite, physical conditioning, and tameshiwari.

His approach demanded courage, humility, perseverance, and discipline. For many practitioners, he came to represent the ideal of karate as a lifelong path rather than only a competitive sport.

== International expansion ==
Oyama promoted Kyokushin through public demonstrations, overseas travel, tournament activity, and the dispatching of instructors to other countries. Under his leadership, Kyokushin expanded across Asia, Europe, the Americas, and other regions.

Major milestones in this expansion included the first All Japan Open Karate Tournament in 1969 and the first World Open Tournament in 1975. These events helped define modern full-contact karate competition and strengthened Kyokushin’s global identity.

== Legacy ==
Masutatsu Oyama is widely regarded as one of the most important figures in modern karate. His influence continued through many Kyokushin-derived lineages and teachers, including figures who helped spread the art in Singapore and beyond.

His legacy endures in the training culture, philosophy, fighting spirit, and technical traditions of Kyokushin-based systems, including [[KyokushinRyu]].

== See also ==
* [[Kyokushin]]
* [[KyokushinRyu]]
* [[International Karate Organization]]
* [[Peter Chong]]
* [[Kumite]]
* [[Tameshiwari]]