On this day, 31 March 1968, Zengakuren - Japanese radical students - clashed with police in riots against the new Narita airport. It was part of an extended campaign for years against the airport which was going to displace hundreds of farmers. This is a history of the Zengakuren: https://libcom.org/history/zengakuren-japans-revolutionary-students https://www.facebook.com/workingclasshistory/photos/a.296224173896073/1684398908411919/?type=3