Ryu Ota

was a Japanese political activist and writer. Initially a supporter of the Japanese New Left, he later turned to green politics before becoming an antisemitic conspiracy theorist.

Biography He was born in Toyohara, Karafuto Prefecture. In October 1945, he joined the Democratic Youth League of Japan. In 1947, he joined the Japanese Communist Party. In 1953, he left the Japanese Communist Party. In 1955, he and Kanichi Kuroda established the Japan Revolutionary Communist League, thus becoming leader of the Fourth International in Japan. In 1957, he established the .

In 1970, he was sentenced to death by his former fellow members for leaving the Japanese Trotskyist League. He spearheaded Ainu Revolution Theory, grouping the Ainu within the lumpenproletariat. In 1971 he attempted to start an Ainu revolution but failed. He and the leader of the , Shoji Yuki, were both arrested for inciting a riot and they continuously blamed each other.

In 1986, he established the Japanese Green Party, but it immediately split into two separate parties and both failed. In 1986, he authored a book called Japan Ecologist Proclamation, in which he proclaimed that "we must overthrow all human dictatorship! Free the cockroaches, free the rats, free the earthworms!" Since 1986, he was a candidate in three elections. In the 1990s he became known as one of the principal publishers of antisemitic materials and Jewish conspiracy theories in Japan including Rothschild and International Jewish conspiracy theories and those by Eustace Mullins and Michael Collins Piper, as well as other conspiracy theories such as Masonic, Illuminati, NWO, Vatican, Committee of 300, UFO, Princess Diana, David Icke and Reptilians, William Guy Carr, Pearl Harbor, JFK, 9/11 and other anti-American conspiracy theories. He was also a self-styled Buddhist philosopher.

Affiliations He was the leader of the following associations:

He was also the author of UFO Theory and Space Civilization: Prospects for 21st Century Science.