One of the most infamous WWE villains of yore has suddenly passed away in his home country of Japan. According to an English translation of Hochi Sports, Masashi Ozawa — better known stateside by his ring moniker of “Killer Khan” — lost consciousness at a restaurant in Tokyo before being rushed to a hospital on Friday. Ozawa died of a ruptured artery. He was 76 years old. When Ozawa came out West to ply his trade after a successful early career in Japan, he took on the identity of a Mongolian “assassin.” In 1980, he made his debut in the WWE (then known as the World Wrestling Federation) as …