Apologies, I have so lititle info but here goes.
A american or british man and a woman, possibly 2 woman end up in a Japanese, Chinese prison (somewhere in asia). They are young, 16 to 21 say and they try to escape. The guy gets killed by a firino squad. I remember the he had a white hood put over his face and heven was terrified and the mask was being sucked into his mouth as he was about to be killed. He was and oneven of the two girls witnessed it through a prison window. I believe she escapes in the end through some passageways/tunnel….