A terrorist bomb explodes at Narita International Airport near Tokyo, killing two and injuring four. An hour later, the same group detonates a second bomb aboard Air India Flight 182, bringing the Boeing 747 down off the coast of Ireland killing all 329 aboard.

The 1985 Narita International Airport bombing was the attempted terrorist bombing of Air India Flight 301, which took place on June 23, 1985. A bomb hidden in a suitcase transiting through Narita International Airport, then known as New Tokyo International Airport, exploded at 06:19 in a baggage handling room, killing two baggage handlers and injuring another four. The bomb exploded prematurely while the plane was still grounded. The attack at Narita was part of an attempted double-bombing orchestrated by Talwinder Singh Parmar, a Canadian national, and the Khalistani terrorist organization, Babbar Khalsa. The bombs were made by Inderjit Singh Reyat.

Narita International Airport — formerly and originally known as New Tokyo International Airport — is the secondary international airport serving the Greater Tokyo Area, the other being Haneda Airport (HND). It is about 60 km (37 mi) east of central Tokyo in Narita, Chiba. The facility, since July 2019, covers 1,137 hectares of land and construction to expand to nearly 2,300 ha is underway.

Air India Flight 182 was a scheduled international flight from Toronto Pearson International Airport to Sahar International Airport with regular Mirabel-London-Delhi stops. On the morning of June 23, 1985, the Boeing 747-237B serving the route exploded near the coast of Ireland from a bomb planted by Sikh terrorists. All 329 people on board were killed including 268 Canadian citizens, 27 British citizens, and 22 Indian citizens. The bombing of Air India Flight 182 is the worst terrorist attack in Canadian history and was the world's deadliest act of aviation terrorism until the September 11 attacks in 2001. It remains the deadliest aviation incident in the history of Air India, and the deadliest hull loss of a Boeing 747, without survivors.