Forbidden Siren (2006)
Original title: サイレン
Forbidden Siren is a 2006 Japanese-language horror movie directed by Yukihiko Tsutsumi, with a running time of 1h 27m. It stars Yui Ichikawa, Leo Morimoto and Naoki Tanaka.
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.