Giant Gaping Sphincter Discovered in Japan

Holy fuck! What the fuck is that thing?! This mystery butthole creature was ostensibly discovered by three drunken Japanese simpletons, who proceeded to penetrate it with sticks and give it a crucial beer enemas for the better part of what seems like half an hour. My better judgement wants to call hoax on it, but actual me needs to believe in the existence of giant frilly pink sucking buttholes.
Please God, I've never asked for much, but I NEED this.
Click the picture to watch the video.