The Japanese embassy hostage crisis began on 17 December 1996 in Lima, Peru, when 14 members of the Túpac Amaru Revolutionary Movement (MRTA) took hostage hundreds of high-level diplomats, government and military officials and business executives who were attending a party at the official residence of the Japanese ambassador to Peru, Morihisa Aoki, in celebration of Emperor Akihito's 63rd birthday. Although strictly speaking the crisis took place at the ambassadorial residence in the upscale district of San Isidro rather than at the embassy proper, the media and others referred to it as the "Japanese embassy" hostage crisis, and that is how it is conventionally known.
Most of the hostages were soon released. After being held hostage for 126 days, the remaining dignitaries were freed on 22 April 1997, in a raid by Peruvian Armed Forces commandos, during which one hostage, two commandos, and all the MRTA militants were killed. The operation was perceived by most Peruvians to be a great success, and it gained worldwide media attention. President Alberto Fujimori initially received much credit for saving the lives of the hostages.
Reports have since emerged alleging that a number of the insurgents were summarily executed after surrendering. These findings have prompted civil suits against military officers by relatives of dead militants. In 2005, the Attorney General's office in Peru allowed the charges and hearings were ordered. After public outcry in defense of the commandos and after military judicial review, all charges were dropped. However, as of 2012, investigations involving the Inter-American Court of Human Rights, referred to the Inter-American Court of Human Rights, were pending.
The surprise ambush and seizure of the Japanese ambassador's residency was the highest profile operation of the MRTA in its 15-year history. The attack propelled Peru in general, and the MRTA in particular, into the world spotlight for the duration of the crisis. Guests reported that the guerrillas blasted a hole in the garden wall of the ambassador's residence at around 8:20 pm the night of the 17 December. The complex had been guarded by over 300 heavily armed police officers and bodyguards.