Abstract: It is intended to provide a sterilizer, an oral cavity sterilizer, a sterilization method, a sterilization apparatus, and a sterilizer evaluation method capable of enhancing a sterilization effect. The sterilizer including hydrogen peroxide and a catalase activity inhibitor containing scutellaria or green tea is brought into contact with a sterilization target. Next, the sterilization target is irradiated with light having a wavelength of 350 nm to 500 nm using a light emitting device formed of a semiconductor laser. By the light irradiation, the hydrogen peroxide is photolyzed to generate hydroxy radicals, and sterilization is achieved by the thus-generated hydroxy radicals.

Abstract: A disinfection method, a disinfection device, and a disinfecting agent which utilizes light, which can achieve a high disinfection effect within a short time are provided. A disinfecting agent containing catechins is brought into contact with an item to be disinfected, and then the disinfecting agent is irradiated with light. The disinfecting agent preferably comprises an aqueous proanthocyanidin solution produced by polymerizing multiple catechin molecules each having a gallate group. Particularly, the aqueous proanthocyanidin solution preferably has a proanthocyanidin concentration of 0.25 to 4 mg/mL. Light with which the disinfecting agent is irradiated preferably has a wavelength of 350 to 500 nm.

Abstract: It is intended to provide a sterilizer, an oral cavity sterilizer, a sterilization method, a sterilization apparatus, and a sterilizer evaluation method capable of enhancing a sterilization effect. The sterilizer including hydrogen peroxide and a catalase activity inhibitor containing scutellaria or green tea is brought into contact with a sterilization target. Next, the sterilization target is irradiated with light having a wavelength of 350 nm to 500 nm using a light emitting device formed of a semiconductor laser. By the light irradiation, the hydrogen peroxide is photolyzed to generate hydroxy radicals, and sterilization is achieved by the thus-generated hydroxy radicals.