Onsen Skin Care and Facial Salon br 128 Newbury St, Boston, MA, 02116 br (857) 317-2986 br br Onsen Skin Care and Facial Salon is located in Boston, MA. We offer natural skin care products using Micro Water Complex that reverses moisture depletion, balances PH levels & boosts collagen. We sell Onsen skin care and deliver facials.