The Kanmon Roadway Tunnel is finished, connecting Honshu and Kyushu by roadway for the very first time. Construction having actually began in 1937, it was halted in 1939 before being resumed by 1952, and now officially opened. The event is also to be marked commemorative postage stamp.
In other news, the Nagasaki Flag incident occurs. Japanese ultra-nationalists pull down a Chinese flag hanging outside a postage stamp exhibition in Nagasaki.