株式会社エテュセ (Et tu sais Co.,Ltd) is a cosmetics company established in 1991, headquartered in Minato-ku, Tokyo. They specialize in the sale of cosmetics and quasi-drugs, offering a variety of beauty products including primers, face powders, mascaras, lip products, and eye shadows. Their products often include skincare benefits such as moisturizing ingredients and are designed to enhance natural beauty with a focus on transparency and softness in finish. The company emphasizes allergy-tested formulations and products designed to be gentle on the skin. They also maintain a customer center for inquiries and beauty consultations. Their product range includes items with features like UV protection, moisturizing, and long-lasting makeup effects.