While korean martial arts have been influenced by both chinese and japanese imperialism and nearly eliminated by the pre-wwII japanese occupation, the traditional korean martial arts were safeguarded, at great personal risk, by the practitioners of family martial arts( sado mu sool ) and by the secret practice of royal court martial arts( koong joong mu sool ), most notably by the family of kuk sool won founder Suh In Hyuk.The sword techniques employed by kuk sool practitoners differ from japanese style in many respects, including sword type, draw and the use of both straight and inverted grip.