context: While Ishii was in junior high school, a book by Masatoshi Nakayama sparked his interest in Shotokan karate, but a Sonny Chiba film later inspired him to pursue training in Kyokushin karate.
source: Ishii began training in Kyokushin karate under Hideyuki Ashihara, who was then a senior instructor in Kyokushin's International Karate Organization (IKO).
reference_original: Ishii begann sein Kyokushin-Karatetraining unter Hideyuki Ashihara, der damals leitender Ausbilder der International Karate Organization (IKO) von Kyokushin war.
reference_flipped: Ishii begann ihr Kyokushin-Karatetraining unter Hideyuki Ashihara, der damals leitender Ausbilder der International Karate Organization (IKO) von Kyokushin war.