Please answer the following question about this movie plot. If it's un-answerable, please output "No answer". Question: Who has invaded Earth? Movie plot title: Goke, Body Snatcher from Hell Movie plot: Air Japan flight JA307 is enroute from Tokyo's Haneda airport south to Itami Airport in Osaka. As stewardess Kuzumi Asakura [Tomomi Sato] announces the flight plan, which will take them over the island of Oshima and the city of Suzuka, the pilot notices an unusual blood red color to the sky around them. That's when the trouble starts.One by one, the passengers begin seeing bloody birds flapping their wings against the windows as though in fear. The pilot [Hiroyuki Nishimoto] receives a radio message to the fact that there may be a bomb aboard and is ordered to return immediately to Haneda. Co-pilot Sugisaka [Teruo Yoshida] is ordered to check the bags of each of the passengers, giving the excuse that a bag containing confidential documents may have mistakenly been loaded on this flight. All bags are clean and only one man [Hideo Ko] has no bag, but Kuzumi notices an unaccompanied suitcase under a bench. Sugisaka opens it and finds not a bomb but a rifle. The man without a suitcase suddenly pulls a gun on Sugisaka and then orders the pilot to change course to Okinawa. To show that he means business, he fires through the cabin a shot that knocks over a transistor radio breaking the news that a UFO has just been spotted over Japan and that Japanese and US Air Force fighters are in pursuit. Suddenly a large luminous object is spotted directly in front of the airplane. It passes overhead but knocks out the airplane's gauges, sparking a fire in the engines. Air Japan flight JA307 goes down on what looks like an uncharted desert isle.Sugisaka is the first to awaken but the pilot is dead as well as the hijacker. Kuzumi is next to recover. Together, Sugisaka and Kuzumi check for more survivors. There is Mrs Neal [Kathy Horan], an American Vietnam War widow; Senator Mano [ Eizo Kitamura] of the Constitutional Democratic Party; weapons exporter Tokiyasu [Nobuo Kaneko] and his wife Noriko [Yuko Kusunoki], who flies into Mr Mano's arms when she finds that she has survived the crash; Psychiatrist Momotake [Kazuo Kato];...
The survivors of the crashed spaceship