Japanese toilets are famed for functions such as posterior shower jets and perfume bursts, but entertainment company Sega has gone a step further by installing urine-controlled games in Tokyo urinals.

Four types of "Toylets" games are available to be played during a test period ending this month at four male bathrooms in pubs and game arcades, in a project aimed at drawing attention to digital adverts.

Each urinal is fitted with a pressure sensor, and a small digital display is placed at eye level. Digital adverts are shown after the games.

Games include "Graffiti Eraser" in which a user tries to aim at the pressure sensor in the urinal to erase virtual graffiti on the display.

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