All Nippon Airways (ANA) Flight 60 was a Boeing 727-81 aircraft making a domestic commercial flight from Sapporo Chitose Airport to Tokyo Haneda International Airport. On February 4, 1966, all 133 people on board died when the plane mysteriously crashed into Tokyo Bay about 10.4 km from Haneda in clear weather conditions while on a night approach. The accident was the worst involving a single aircraft and was also the deadliest accident in Japan at that time until All Nippon Airways Flight 58 crashed 5 years later, killing 162.

Chitose Air Base , is a Japan Air Self-Defense Force base located in Chitose, Hokkaidō, adjacent to New Chitose Airport. It is the JASDF's primary base in northern Japan and tasked with monitoring Japan's maritime borders with Russia. It was also Hokkaidō's primary civilian airport until the opening of New Chitose Airport in 1988. Together, these two jointly operated and connected airports create one of the largest regional airports in Japan.