


In 1938, at the age of 15, he travelled to Japan to train as an aviator, to be like his hero of the time, Korea's first fighter pilot. Survival on his own at that age proved to be more difficult than he thought, especially as a Korean in Japan, and the aviator training fell by the wayside.
He did however continue martial arts training, by participating in judo and boxing, and one day he noticed some students training in Okinawan Karate. This interested him very much and he went to train at the dojo of Gichin Funakoshi at Takushoku University, where he learned what is today known as Shotokan Karate.
His training progress was such that by the age of seventeen he was already
a 2nd dan, and by the time he entered the Japanese Imperial Army at 20,
he was a fourth dan. At this point he also took a serious interest in judo,
and his progress there was no less amazing. By the time he had quit training
in Judo, less than four years after he had started, he had achieved the
rank of fourth dan in Judo.

The relative solitude was strongly felt, and after 6 months, Yashiro secretly fled during the night. It became even harder for Oyama, who wanted more than ever to return to civilisation. So Nei Chu wrote to him that he should shave off an eyebrow in order to get rid of the urge. Surely he wouldn't want anyone to see him that way! This and other more moving words convinced Oyama to continue, and he resolved to become the most powerful karate-ka in Japan.
Soon however, his sponsor informed him that he was no longer able to support him and so, after fourteen months, he had to end his solitude.
A few months later, in 1947, Mas Oyama won the karate section of the first Japanese National Martial Arts Championships after WWII. However, he still felt empty for not having completed the three years of solitude. He then decided to dedicate his life completely to karate-do. So he started again, this time on Mt. Kiyozumi, also in Chiba Prefecture. This site he chose for its spiritually uplifting environment.
This time his training was fanatical - 12 hours a day every day with no rest days, standing under (cold) buffeting waterfalls, breaking river stones with his hands, using trees as makiwara, jumping over rapidly growing flax plants hundreds of times each day. Each day also included a period of study of the ancients classics on the Martial arts, Zen, and philosophy.
After eighteen months he came down fully confident of himself, and able to take control of his life. Never again would he be so heavily influenced by his society around him. (Though it is probably safe to say that his circumstances were also probably never again as traumatic!)

In 1952, he travelled the United States for a year, demonstrating his karate live and on national televison. During subsequent years, he took on all challengers, resulting in fights with 270 different people. The vast majority of these were defeated with one punch! A fight never lasted more than three minutes, and most rarely lasted more than a few seconds. His fighting principle was simple - if he got through to you, that was it.
If he hit you, you broke. If you blocked a rib punch, you arm was broken or dislocated. If you didn't block, your rib was broken. He became known as the Godhand, a living manifestation of the Japanese warriors' maxim Ichi geki, Hissatsu or "One strike, certain death". To him, this was the true aim of technique in karate. The fancy footwork and intricate techniques were secondary (though he was also known for the power of his head kicks).
It was during one of his visits to the United States that Mas Oyama met Jacques Sandulescu, a big (190 cm and 190 kg of muscle) Romanian who had been taken prisoner by the Red Army at the age of 16, and sent to the coal mines as a slave labourer for two years. They quickly became friends and remained so for the rest of Oyama's life, and Jacques still trains and acts as advisor to the IKO(1) to this day.

Maybe a Kyokushin diaspora will be a good thing, since in all good families,
some of the children eventually do leave home and start their own families.
Some of the splinter groups may remain faithful to the Kyokushin principles,
such as Hanshi Steve Arneil in Great Britain did in 1991. Many others,
such as Shigeru Oyama in the U.S., have taken it further by developing
their own style based on Kyokushin.