Anecdotes

It was based on the 1994 Japanese novel "Piercing" by Ryû Murakami.

The pimp whose voice is only heard on the phone is played by an uncredited Harold Perrineau.

The film reuses pieces of music from the soundtracks of the Italian films Camille 2000 (1969), La dame rouge tua 7 fois (1972), Les Frissons de l'angoisse (1975), Tentacules (1977) and Ténèbres (1982).

The yellow phone set in the hotel room is famous design awarded electronic phone set ETA 80, made by Iskra co., Yugoslavia from 1980.

The phone set, wife is talking on and holding by her bed is ATA 40 - CONTINENTAL from 1972, made by Iskra co., Yugoslavia.