Japan has asked the makers of Pokemon go to prevent the animated monsters appearing in the Fukushima disaster zone after at least one was discovered on the site.

They are worried Pokemon hunters will put themselves in danger while playing the game if Pokemon continue to appear on the site of power stations in the area.

Tokyo Electric Power Company Holdings (Tepco) has asked Niantic and the Pokemon Company to stop the collectible characters appearing in or near areas affected by the nuclear reactor meltdown in Fukushima.

This is to help prevent encouraging players to enter dangerous areas.

Tepco said it tested the Fukushima Daiichi plant, the Fukushima Daini plant and the Kashiwazaki-Kariwa plant in Niigata Prefecture and found Pokemon.