Japan Hygiene Center Kagoshima Branch Shirasu Department.Shirasu is an ingredient of Shirasu Sorp series that was awarded for 2012 Kagoshima New Special Product Competition. It originates from the volcanic ash clay sedimentary layer that was exposed due to volcanic activities 400 to 800 thousand years ago. We turned it into tiny particles smaller than 40 μm. The synergistic effects from ions and infrared light of mineral-rich shirasu, combined with the coconuts paste, will help beautify and firm your skin.