That fundamentalist cult is still there under the surface. The current prime minister is a grandson of one of the leaders who was charged with war crimes after WWII, and unlike in Germany where it is taboo to deny Nazi atrocities, in Japan it is still taboo to admit to Japanese atrocities in China. However, the point is that Japan reverted to a certain level of normality in its international relations, and other countries welcomed it back into the family of nations. If ISIS toned down its extremism a little and made political compromises with other nations, it is not inconceivable that it could transform itself into a legitimate state that is no more extreme than Saudi Arabia. And that says a lot about our acceptance of Saudi Arabia as a member of the international community.
The camp commander, Captain Yonoi (Ryuichi Sakamoto), carries his shame and recognizes that one of the enemy captives, Major Jack Celliers (David Bowie), suffers from a similar affliction--a shame that resulted in a disregard for his own life, which comes across as apparent bravery and fearlessness. For Yanoi, this recognition remains subconscious, as it only triggers an erotic attraction which deepens the shame in his tortured psyche. He can explain it only as a demonic possession that his enemy has inflicted on him.
John W. Dower, Embracing Defeat: Japan in the Wake of World War II (Norton & Company, 1999).
Kurt Loder, "Straight Time," Rolling Stone, May 1983, (interview with David Bowie)
Richard H. Minear, Victor's Justice: The Tokyo War Crimes Trial (Princeton, New Jersey: Princeton University Press, 1971).