Following Friday's launch of the "Pokemon Go" game in Japan, managers of tourist sites and summer festivals nationwide expressed concerns about distracted players chasing down the virtual monsters that the game places on their smartphone screens.
In Tomioka, Gunma Prefecture, warning signs were posted Saturday at two places in the Tomioka Silk Mill, a UNESCO World Heritage site, cautioning players to respect off-limit areas, those around them and avoid accidents.
The silk mill is said to contain six places where Pokemon players can find virtual items related to the game.