Shirasu - Super Soil Sensation!

It blew out of an erupting volcano in southern Kyushu over 20,000 years ago. This pyroclastic deposit known as "shirasu" is a fine soil that now covers a vast plain. But unsuited to cultivation, it soon became known as a curse among locals. Now scientists have created a new material with it. Called "SPG", it has found uses in compact electronics and even cutting edge medical applications. You'll have to tune in to find out more about this mystery new material!