Middle Core Faction

Revolutionary Communist League, National Committee
Headquarters in Edogawa, Tokyo
Founded	1950s
Ideology	Marxism Communism
Politics of Japan Political parties Elections

Japan Revolutionary Communist League, National Committee (革命的共産主義者同盟全国委員会 Kakumeiteki Kyōsanshugisha Dōmei, Zenkoku Iinkai^?) is a Japanese far-left revolutionary group, often referred to as Chūkaku-ha (中核派 Middle Core Faction) in Japanese. Their main goals is to have Japan, and the entire world, adopt communist policies. Chūkaku-ha reject imperialism and the Stalinist form of Communism. They were formed in 1957 after the anti-Stalinist communist revolution. This revolution spawned over disputes about communist policies and a rejection of the Russian style of communism. Over the last few years, they have lost support.

Chūkaku-ha was formed in January 1957. They were fervently anti-Stalinist. They believed the Stalinist form of communism, which was present in Eastern Europe, China, USSR and North Korea, did not elevate the working class as true as Marxist communism intends. Their goals at this time were to overthrow the Japanese government, stop U.S. occupation of the island of Okinawa, and abolish the Japan-US Security Alliance. The group evolved after two schisms into its current form. The first schism branched off separately from Chūkaku-ha over a disagreement between degenerated workers and formed the Communist League (CL) in 1958. In 1959 another disagreement led to the addition of National Committee to the end of the name. In 1960 the Marxist Student League (MSL) would form as an unofficial youth branch of the Chūkaku-ha. This was followed in 1961 by the creation of another unofficial youth branch, the Marxist Workers' Youth League (MWYL). In 1963 another disagreement would lead to the formation of JRCL Revolutionary Marxist Faction. Also this would bring about the name Middle Core Faction, as another way of referring to Chūkaku-ha.

In 2017, the MPD announced the arrest of Masaaki Osaka, a known JRCL NC leader accused of killing police officers during the Cold War（Shibuya riot () ）.

Starting in 1967, Chūkaku-ha, would become active in organizing protests, usually recruiting students as their protesters from both youth organizations, MSL and MWYL. Their first protest was against the Japanese Prime Minister Sato's visit to South Vietnam. In 1968, they protested the visit of the US nuclear submarine, Enterprise, to Sasebo, Japan. That same year there was another protest of the Sinjuku Rail Station's transportation of US forces fuel tanks. In 1969 the organization promoted several protests at campuses across Japan. During the early 1970s the group was engaged in conflict with a rival organization known as Kakumaru. During the conflict, Kakumaru assassinated several members of Chūkaku-ha. According to Chūkaku-ha, Kakumaru was aided and protected by the police.