That same month, Masutatsu OYAMA, the founder of Kyokushin Kaikan, who, having become skeptical of traditional-style karate, was pursuing the realization of karate tournaments under direct-attack rules based on his own philosophy, generated a great buzz throughout the karate realm by hosting the first Open Tournament All Japan Karatedo Championships at Tokyo Metropolitan Gymnasium in Yoyogi, whereby contestants, who were prohibited from wearing any protective gear, fought with bare hands and bare feet under direct-attack rules (attacks to the face were prohibited, except with kicking).
そして、同年同月、伝統派空手に疑問を抱き、独自の理論で直接打撃制の空手試合を模索していた極真会館創始者の大山倍達（おおやまますたつ）によって、防具を一切着用しない、素手、素足の直接打撃制（足技以外の顔面攻撃禁止制）による第1回オープントーナメント全日本空手道選手権大会が代々木の東京体育館で開催され空手界に一大旋風を巻き起こした。