- High quality powerful Japanese air purifier for removal of pm2.5 dioxins , dust -Enormous negative ion generation (more than 20 million parts per cc) The Maeda Yamagata air ionization system is proven to eliminate 99.9% of influenza virus. Decomposition and removal of PM2.5 dioxins, pollen, dust, RS virus, mycoplasma, Staphylococcus aureus,..