A Japanese sex festival was over prematurely as herds of virtual porn fans caused overcrowding fears.

Streams of locals were looking to get their hands on the latest inventions from the adult entertainment industry in the first festival of its kind - the Adult VR Fest 01 in the Akihabara region of Tokyo.

But fans of virtual reality porn, which re-enacts sex and other acts using a blend of simulation headsets, male-friendly sex toys and other gadgets, were left disappointed as the event was shut down due to unprecedented popularity.

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Eager beaver: Among the attractions was a machine that simulated a woman on top of a man as he lay on the floor (pictured) and another where punters put their hand into a cardboard box which blew air in a way that allowed people to fondle what felt like a breast

Hard lines: Streams of locals looking to get their hands on the latest inventions from the adult entertainment industry in the first festival of its kind - the Adult VR Fest 01 in the Akihabara region of Tokyo

Among the attractions was a machine that simulated a woman on top of a man as he lay on the floor and another where punters put their hand into a cardboard box which blew air in a way that allowed people to fondle what felt like a breast.

Google searches for virtual reality porn have shot up by 10,000 percent in the last 20 months and the popularity was evident as dozens of eager fans got turned away.

A Japanese reporter told VR Talk: 'For those who did get to go inside, excitement ran wild.

'I'm not entirely sure if the same thing would happen in the US, but VR porn enthusiasts rushed to have a go at some of the latest virtual reality gadgets.'

It's understood around 20 fans made it inside, but as crowds continued to jostle for position outside in the queue, organisers called the event off.

Bosses have vowed fans that next time the event will be held in a bigger venue to facilitate the erotica enthusiasts.

Out of hand: Google searches for virtual reality porn have shot up by 10,000 percent in the last 20 months and the popularity was evident as dozens of eager fans got turned away amid fears of a riot

A blogger, known only as Eizo0000, said staff were in tears when the festival was called off, and said: 'The event didn’t start until 2 PM, so I went there in high spirits an hour before then, but the city was already overflowing with people.

'There were so many that it was almost impossible to keep the situation under control. 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.

'The 20 lucky guys closest to the building were let in by the staff. I’m sure there was a line inside the building that rivaled the one outside.

'Outside the building for the Adult VR Fest, the unofficial waiting outside the building spanned both sides, so it was a real hell here.

Fantasy vs reality: What the punters see in their headsets (left) and the stark reality of what is actually happening

It's understood around 20 fans made it inside, but as crowds continued to jostle for position outside in the queue, organisers called the event off

'These people are the people putting their lives on the line for Adult VR.

'They don’t like this world, and they know women don’t see them in a good light.

'They have their own needs that have yet to be fulfilled, but they don’t want to bother anyone with them.

'Thus, they turn to a new world.

'Honestly, they’re wonderful people hoping for a brave new world, and they’ll finally have one soon enough.

'There were plenty of problems while waiting to get in, but none of these patient gentlemen voiced any complaints.

'They simply waited silently to be let in. It was about 20 minutes after opening time when their leader appeared.'