Some quick facts:

The VAs for Siren were British, so every Japanese person had a posh accent and didn't pronounce Japanese words so well

Siren 2's main setting, Yamijima Island, was inspired by an actual Japanese Island, Hashima island. The Island was an industrial hub for coal mining and was known for forced labor involving Korean and Chinese slaves.

Both games used facial scans from multiple angles to create the uncanny, and horrifying, expressions of the various protagonists and enemies