Siren

A writer moves to a remote island with his daughter and young son. After settling into their new home, a neighbor arrives to welcome them and give them a breakdown of the local rules; most important: do not go outside when the island's siren starts wailing.

Siren is a 2006 horror thriller movie directed by Yukihiko Tsutsumi, starring Hiroshi Abe, Leo Morimoto, Naoki Tanaka. It holds an IMDb rating of 5.4/10 from 1,058 votes and runs 1h 27m.