Brand from Japan: Kao. This foam effectively kills odor-causing bacteria on your tongue!Simply apply the foam directly to your tongue, gently stir for 10 seconds to distribute it evenly, then brush your teeth.No need to brush your tongue.The fine foam penetrates deep into the tongue coating, cleaning between teeth and the surface of the tongue, effectively preventing bad breath.The antibacterial ingredient CPC (hexadecylpyridine chloride) kills bacteria that cause bad breath and prevents the occurrence and development of cavities.The anti-inflammatory ingredient GK2 (dipotassium glycyrrhizate) inhibits gingivitis and prevents periodontal disease (gingivitis and periodontitis).How to use:Take an amount of foam the size of a 500 yen coin and apply it directly to the tip of your tongue.Gently stir to distribute the foam evenly, then brush your teeth.This product is a refill only.