Unicharm said it has used sterilisation, bleaching, and deodorising technology involving ozone to ensure that the recycled nappies were free from unpleasant smells and bacteria. Tsutomu Kido, a senior executive officer at Unicharm said: "We have received approval from experts concerning hygiene," according to the Mainichi newspaper. The recycled nappies have been used in hospitals and nursing care facilities in Kagoshima since they were developed in 2022. The range now on general sale includes those for children, which cost slightly more than regular disposable nappies, according to Unicharm.