A pop-up shop with a difference appeared on the fashionable streets of Shibuya last month. Open until Aug. 25, and again between Sept. 6 and Sept 23, the Nazo Tomo Cafe is a mystery waiting to be solved. Inside, for ¥1,000, customers can team up with strangers or friends to solve a puzzle of their choice. For us the appearance of this cafe is an indication that the trend for real-life puzzle games is really booming.

It all started back in 2008 when SCRAP introduced The Real Escape Game. A real-life version of popular escape games for the PC, players are trapped in a room and have to figure out clues in order to free themselves within a time limit. The idea of making these virtual rooms a physical reality was hugely popular and really took off in Japan. Indeed, SCRAP has even exported the game overseas, holding their first event in San Francisco last December.

Part of the success of the game could be due to the social aspect — players have to collaborate to escape in time. Indeed, as with paint balling, companies sign up employees to play as a team-building exercise. The idea of solving puzzles in a real-life, real-time setting has clearly taken off. Escape games are now held all over the country by a number of different companies. Different kinds of puzzle games have also begun to become popular (for example, games in which teams hunt for treasure) and amusement parks have become popular venues for these larger-scale events.