SENSAI ULTIMATE the concentrate 30 ml SENSAI ULTIMATE the concentrate 30 ml is a concentrated serum formulated with Koishimaru Silk EX and Sakura Eternal Complex to provide intense hydration and nourishment. This serum helps to reduce the appearance of wrinkles and other signs of aging while improving skin tone, texture, and elasticity. It also helps to protect the skin from environmental stressors and free radicals. This serum can be used daily, morning and evening, after cleansing and before moisturizing.