But underneath this unassuming toilet is a whole new kind of sewage system that uses a vacuum instead of water to move waste. “I even talk about faeces during mealtimes.” ...

The essence of the project, as with all biogas systems, is tapping into what’s nearby. “We want to work on collecting local waste,” says Tom Guise, the company’s CEO.

Both organisations have now joined forces to launch the biogas toilet initiative in Kampung Bukit Besi, with the first system set to be installed in the home of the village chief.

Asahi Kasei and Kurashiki City held a grand opening ceremony for a biogas purification system (the System) in Kurashiki, Okayama Prefecture, Japan.

Enter the Neo. Part motorcycle and part toilet, it runs on eco-friendly biogas produced from sewage -- and recently completed a journey of more than 1,000 km (600 miles) across Japan.