In 2010, while working as head of the Psychosomatic Internal Medicine Department at Kyodo Hospital in Okinawa, Japan, Dr Ryoji Aritsuka was interested to come across a number of cases of insomnia among his elderly patients. The US military bases in Okinawa were built in the immediate aftermath of the battle in 1945, with the US air force base of Kadena being constructed on the remains of a Japanese airfield from which Kamikaze aircraft operations had been conducted against the invading US forces. In his study one woman survivor, now in her eighties and living in the vicinity of US Marine Corps Air Station Futenma reported that her flashbacks had increased since US Osprey transport aircraft were deployed there. The Cave Mouth could be approached as a film work. Indeed it has been screened in a stereo version at conferences in 2015 of the Association for Social Anthropology and at Cambridge University.