Karate to England and Italy respectively, and karate came under the influence of the JKA Hiroshi Shirai, one of the original instructors sent by the JKA to Europe along with Kase, Enoeda and Kanazawa, moved to Italy in 1965 and quickly established a Shotokan enclave that spawned several instructors who in their turn soon spread the style all over the country. By 1970 Shotokan karate was the most spread martial art in Italy apart from Judo. Other styles such as Wado Ryu, Goju Ryu and Shito Ryu, although present and well established in Italy, were never able to break the monopoly
Ryu Hayabusa a "Bio-Noid", created by Irene's superior and corrupt CIA director, Foster. After Ryu defeats the double, Foster is killed by H.P. Clancy, who had instructed Ryu to locate a ruin called the "Castle Rock Fortress", which was the base of Foster's Bio-Noid experimentation and has also secretly housed an interdimensional warship that Clancy intends to use for global dominance. Ryu kills Clancy in battle and the ship is destroyed as Ryu escapes with Irene, bringing the first-generation "Ninja Gaiden" storyline to a close. The 1992 Sega Master System version of "Ninja Gaiden" scraps the entire narrative of the original series