Research students at the Tsukuba University have developed a coat, which gives the feeling of being hugged from behind by a girlfriend. The coat contains a belt, which produces the sensation of a hug.
Headphones are attached along with the coat and it plays recorded female voice saying sweet phrases, a girlfriend would generally say. Phrases like, "Sorry I'm late" are included.
The coat is named 'Riajyuu', which means someone who is pleased with their life in reality outside the internet.
Japanese students have been inventing many simulations including robotic buttocks, which simulates the feeling of being smacked. Development of a kissing simulator is in progress.