[7] These developments led directly to the formation in 1957 of the Trotskyist Revolutionary Communist League (abbreviated Kakukyōdō in Japanese) by dissident student activists breaking free from the JCP, under the guidance of the charismatic half-blind philosopher Kan'ichi Kuroda.[11] The radical student activists were undeterred however, and in January 1960, organized a sit-in in Tokyo's Haneda Airport to try to physically block Prime Minister Nobusuke Kishi from traveling to Washington, D.C. to sign the new treaty.[13] This time, however, they were met by hundreds of police armed with truncheons, who attempted to force them back out, precipitating a bloody struggle that lasted for many hours, long into the night.[15] The first open splits within Zengakuren occurred in the immediate aftermath, and thereafter the previously unified nationwide student federation rapidly disintegrated into numerous warring factions, paving the way for the rise of the radical New Left "sects" (sekuto) that would play a leading role in the 1968–69 Japanese university protests.[27] The New Left activists of 1968-1969 drew ideological inspiration from the works of Marxist theorists like Karl Marx and Leon Trotsky, French existentialist philosophers like Jean-Paul Sartre and Albert Camus, and the homegrown philosophy of the Japanese poet and critic Takaaki Yoshimoto.In 1969, the passage of the Act on Temporary Measures concerning University Management gave police the legal basis to smash through the barricades, enter campuses, and restore order, dealing a harsh blow to the New Left movement.[30] Together the twin defeats of the campus struggles in 1969 and the Anpo protests in 1970 led to a renewed round of recriminations and schisms, as New Left groups further split into dozens of warring factions amidst even more violent internal conflict.[30] The Japanese Red Army decamped to the Middle East and promptly embarked on a campaign of international terrorism that lasted well into the 1980s, beginning with the Lod Airport Massacre in 1972.[32] Together the Asama Mountain Lodge Incident and the Lod Airport Massacre have often been portrayed as an end point of Japan's New Left movement, as these extreme actions shocked the Japanese people and led to mass desertions from the remaining sects.
A scrum at the rostrum of the National Diet, as
Japan Socialist Party
Diet members attempt to prevent Speaker of the Lower House
Ichirō Kiyose
from calling for a vote on extending the Diet Session, while being restrained by police officers, May 19, 1960