A virtual reality porn festival in Japan was shut down after too many simulated sex enthusiasts came... um, make that... arrived early.

It has emerged that the country’s first-ever event of its kind, Adult VR Fest 01, was turned off early last month because of overcrowding at the Akihabara district venue.

#VirtualReality porn event #Adult VR Fest in Tokyo postponed due to overcrowding - Everyone wanted to come! https://t.co/gT6mpV8qhA#tech — Max Green (@MaxGreenerSide) July 5, 2016

The festival offered visitors a peek at the latest in VR sex tech including a headset which, with the help of an inflatable doll, replicated sex with a women.

A translated version of events which appeared on VRTalk described how pent-up porn fans were turned away as a “riot” threatened to erupt outside the festival, before attendees got a chance to penetrate the venue.

@akd Over 500 people showed up to an Adult VR fest in Japan, overflowing into the street. Cops had to break it up https://t.co/EN5P3e3Tyu — kDotLo (@kDotLo) June 12, 2016

Gaming News Update: Adult VR Festival Draws Huge Crowds in Japan: [Image: 2ch]This weekend, the Adult VR Fest... https://t.co/tx01f6wFCY — EvanTheGamer (@EvanTheGamer) June 13, 2016

“The event didn’t start until 2:00 p.m., so I went there in high spirits an hour before then, but the city was already overflowing with people,” local blogger Eizo0000 reported.

READ MORE: Virtual reality sex suit looks as disturbing as it sounds (VIDEOS)

“While waiting for my friends, I couldn’t help but think that if they couldn’t control the mass of people, a riot or something similar could happen,” wrote Eizo0000. “The 20 lucky guys closest to the building were let in by staff.”

Adult VR Fest in Akihabara draws big crowd https://t.co/iBl4yoZlin [J] - Waiting for int'l media to link it to Japan's low birth rate. — Tomoyuki Akiyama (@tomoakiyama) June 13, 2016

A bizarre video, purportedly from inside the event, gives some insight into the weird world of VR porn.