I remember watching the live coverage of the incident on TV. A sect to be part of the URA had hijacked a Japan Air Line jet named Yodo two years before, which was the first hijack incident in Japan. The sect member exiled themselves to North Korea, and one of them is still alive there.
As a side note, the official cameras for our National Police Agency were Pentax then which were froze and malfunctioned during the incident in February. On the other hand, the Nikon cameras commonly used by newspapers functioned properly, which made the police to switch from Pentax to Nikon.