A mobile phone company has installed dispensers for "toilet paper" to be used on smartphones in the conveniences at Japan's Narita International Airport.

The dispensers have been put in place in 86 toilet cubicles at the airport's arrival terminal, where they will remain until March 2017.

Provided by NTT Docomo, Japan's largest mobile operator, they will be stocked with paper sheets to be used to keep phones clean.

The sheets also bear messages welcoming visitors from overseas, and offering information on how to connect to Docomo's WiFi service.