Mixing virtual reality from the past with present-day reality may sound confusing but it's actually a simple concept.
If replicas are digitally projected at historical sites where famous buildings or structures once stood before disappearing years ago, that's a mix of virtual reality from the past and the current world.
This is one way to use mixed-reality technology, which combines virtual reality with reality. Tokyo-based AsukaLab Inc. is using it to digitally reconstruct ruins and provide more realistic and interactive tours in a bid to stimulate tourism at historic sites.