What's the song when Shiro is dying in the main chapel? In Ninja Resurrection: The Revenge of Jubei (the 1st OVA), there's a song playing near the end when Shiro is dying in the main chapel while being pleasured (reference on YouTube, potentially NSFW).

What's the name of the song?
It's "Banner-Seal of Heterodoxy: The Son of Deus", the 4th track from "Ninja Resurrection (Original Soundtrack)". The preview of the OST can be listened on AllMusic.

According to the OP's comment,


  it's the 4th song from the link you mentioned! Banner-Seal of Heterodoxy: The Son of Deus.