There is a fair share of people over here in Canada and the United States who have an interest in the supernatural, and that is also true for the Japanese. Folklore abounds there with tales of long-necked women, kappa sprites, and other creatures, and there are plenty of scary tales to chill listeners right down to the bone even in the hottest of summers.
One of the more recent phenomena to get folks' hackles up is the shinrei shashin（心霊写真...ghost pictures） in which faces or other body parts mysteriously pop up behind people and in structures. Personally, I think it's more of a visual coincidence or a double exposure in those photos than anything else but I've watched variety shows in which the tarento turned multiple shades of blue and grey and screamed their heads off at all sorts of weird shots. The above video has about 7 minutes' worth of shinrei shashin so watch...if you dare.😝😝
Now, the supposed weird voice pops up at about 2:54 in the above video (Sorry but the recorded version has been taken down so you'll have to rely on your own copies) for "go for it!". My good buddies' faces froze when they heard it but I couldn't quite get it myself since I had heard it every time that I played the cheerful DCT song. To me, it was just an added spoken vocal for flavour...not an anguished cry from Hell.😏 I looked at them, both of who were/are far more kakkoii than me, and wondered what the problem was here.
There was a similar story regarding rock band B'z. Their November 1990 album "Risky" was a big No. 1 hit to be sure, but it also garnered some more infamy and the story even reached the popular Fuji-TV noon hour show "Waratte Ii Tomo!"（笑っていいとも！）one day in 1993. Supposedly, certain CD copies of the album didn't start off with that 1-minute-and-change instrumental which was the title track. Instead, as host Tamori and comedy duo Utchan-Nanchan found out, it started out with a moaning female voice. Consider your hackles risen!😱
However, it was actually made into the ending theme for the TV Asahi drama "Daihyo Torishimayaku Deka"（代表取締役刑事...Representative Director Detective） from that same year. Well, we've had a busybody maid, two housewives and high school students become sleuths on live-action TV from my memories. Why not a representative director?