Iko or IKO may refer to:
Kyokushin (極真) is a style of karate originating in Japan. It is a style of stand-up fighting and is rooted in a philosophy of self-improvement, discipline, and hard training.
Kazuyoshi Ishii is a Japanese master of Seidokaikan karate and founder of the K-1 fighting circuit, a widely televised international martial arts competition combining Muay Thai, karate, sanshou, taekwondo, kenpo, boxing, and kickboxing. His karate training began with Kyokushin karate, but he formed his own karate organization in 1980, began promoting televised karate competitions, and started staging K-1 events in 1993.
Steve Arneil was a South African-British master of Kyokushin karate. He learned directly from Masutatsu Oyama and was a senior instructor in Oyama's International Karate Organization (IKO) until 1991, when he resigned from the IKO. Arneil was the founder and President of the International Federation of Karate (IFK), held the rank of 10th dan, and held the title Hanshi. He and his wife settled in the United Kingdom in 1965.
Masutatsu Ōyama, more commonly known as Mas Oyama, was a 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 1968.
Loek Hollander was a prominent Dutch karate practitioner.
Francisco "Chiquinho" Alves Filho is a Brazilian Kyokushin Karateka and kickboxer. He is one of the few karate-ka to have successfully completed the 100 man kumite more than once.
Shokei Matsui, also known by his Korean name of Moon Jang-gyu, is a South Korean martial artist in Japan. He is the master of Kyokushin karate and current Kancho (Director) of the International Karate Organization Kyokushin-kaikan, faction of the International Karate Organization (IKO) founded by Mas Oyama (1923–1994).
Ewerton Teixeira is a Brazilian professional kickboxer, mixed martial artist, and Kyokushin Kaikan karateka. Teixeira obtained his first K-1 title in 2008 at K-1 World Grand Prix 2008 in Fukuoka by beating Keijiro Maeda in the final. He is training K-1 at the Ichigeki Academy Kyokushin Kaikan in Tokyo, Japan. Despite the short career for a kickboxer, Teixeira has notable wins against K-1 legends: Jerome Le Banner, Errol Zimmerman and Musashi.
Andrews Nakahara is a Brazilian professional mixed martial artist, kickboxer and kyokushin karateka currently signed with K-1. He made his MMA pro debut against Kazushi Sakuraba at the Dream 2: Middleweight Grand Prix 2008 First Round. Andrews and Francisco Filho were awarded in 2008 a Brazilian Jiu-Jitsu Blue Belt under former Strikeforce contender Marcos Barbosa.
Hajime Kazumi (born December 14, 1971) is a Japanese karateka. Born in Kanagawa prefecture, Kazumi is a karate fighter who played an active part in the full-contact karate tournaments hosted by Kyokushinkaikan from the early 1990s to the early 2000s.
Jayson Vemoa is the President of the Japan Niue Friendship Association based in Tokyo and has served as an Honorary Consul and Special Envoy to Niue in Japan.
He is a former two time Muay Thai World Champion kickboxer from New Zealand of Niue and Cook Islands descent. He led a successful professional martial arts coaching career during the K-1 World Grand Prix and Pride Fighting Championships era in Japan.
The list of people he has trained in the past includes the late Jonah Lomu, Hidetoshi Nakata, Noriyuki Higashiyama, Ray Sefo, Glaube Feitosa, Aleksandr Pitchkounov, Jordan Tai, Doug Viney, Ewerton Teixeira, Mark Hunt, and Jan Soukup.
Edward 'Bobby' Lowe was a prominent Chinese American master of Kyokushin karate. He was the first uchi deshi of Masutatsu Oyama, founder of Kyokushin karate, and established the first Kyokushin school outside Japan. Lowe held the title of "Shihan" and was the Senior Instructor and an International Committee Chairman of the International Karate Organization founded by Oyama.
Peter Chong Seh Jam, PBM, is a Kyokushin karate master and a former Assistant Superintendent of Police in Singapore.
Kenji Midori is a Japanese martial artist. He is an instructor of the Full-contact Karate. He has an 8th Dan black belt in World Karate Organization Shinkyokushinkai.
Hatsuo Royama also known by his Korean name of Noh Cho Woong is a master of Kyokushin Karate and was current Kancho (Director) of the Kyokushin-kan International Organization Honbu, one faction of the International Karate Organization (IKO) founded by Mas Oyama (1923–1994) until April 2022.
World Open Karate Championship is the largest competition in Kyokushin Karate. This tournament is arranged every fourth year in Tokyo.
World Karate Championship in Weight Categories is the second largest competition in Kyokushin Karate. This tournament is arranged by several kyokushin organisations and usually held every fourth year in between World Tournaments which do not have any weight classes.
Seiji Isobe is Japanese Karate instructor residing in Brazil. He is a member of the IKO1 's international committee and is the General Manager of the South American Regional Federation. He holds a rank of 8th Dan Black in Kyokushin Karate.
The Armenian Kyokushin Karate Federation, is the regulating body of kyokushin karate in Armenia, governed by the Armenian Olympic Committee. The headquarters of the federation is located in Yerevan.