This is the Senka Perfect Whip Facial Wash, a famous and widely used cleansing foam! I think it's hard to find a cleansing foam that is as rich, soft, moisturizing, and leaves your skin squeaky clean while removing makeup so thoroughly. It is a low-irritation cleanser suitable for sensitive skin, and I heard it can even remove ultrafine dust. I really love that it lathers up well even with just a small amount.