is a fictional character, the protagonist of the Japanese historical fantasy series Teito Monogatari, created by Hiroshi Aramata. He first appeared in a 1983 issue of a science fiction magazine published by Kadokawa Shoten but gained more widespread attention with successive publications as well as his cinematic debut, and has since gone on to be referenced frequently in Japanese popular culture. His character is generally associated with onmyodo mysticism since Teito Monogatari was one of the first novels to popularize the art in modern Japanese fiction. In Japanese, he is commonly referenced with the prefix due to his incredible superhuman abilities and near immortality. Biography Katō is a supernatural Melmoth the Wanderer-style figure with a mysterious past. He is described as an oni born from the grudge of 2000 years of Japan's hidden history. As his opponent Yasumasa Hirai, the official descendant of the mythical Abe no Seimei and leader of the true onmyoji who serve the Japanese Emperor explains: However Katō is also a powerful sorcerer; a skilled onmyoji who manipulates oni. Later on in the novel, his birthplace is determined to be Ryūjin, Wakayama and associations are made between his lineage and Abe no Seimei's clan. The implication is that Kato's ancestors were heretics who practiced onmyodo magic outside the established government. In the 19th century, he enlists in the Imperial Japanese Army under the guise of a Japanese soldier and rises to the rank of First Lieutenant. In Teito Monogatari, Katō reveals his true intentions to destroy Tokyo through any means possible in order to cripple the Japanese Empire. He joins forces with underground Chinese and Korean anti-Japanese oppression groups (such as Donghak Peasant Revolution) and continues to work behind the scenes of various periods of 20th-century history to cause supernatural disasters which will weaken Japan. His first goal is to awaken the sleeping spirit of Taira no Masakado to help him cripple the country. However, his plans branch off into feng shui territories, agonizing the firmament and earth dragons to cause earthquakes and other natural disasters. In 1927, his efforts are temporarily sabotaged by the powerful miko and priestess of Masakado, Keiko Tatsumiya. In 1945, he is instrumental in the death of Franklin D. Roosevelt. The Japanese government organizes a plan to assassinate the Allied leaders through a Buddhist curse cast by abbot Otani Kozui, with their first target being Roosevelt. The Japanese Freemasons politically oppose