Ashi-What? Ashi (foot) -atsu (pressure) is a deep, painless form of barefoot massage that you will love. It is deeper than deep tissue massage. Deep tissue massage fanatics often ask for more pressure than the therapist is able to consistently provide. With Ashiatsu, the massage therpist has the potential of applying their entire body weight when appropriate. You can’t get much deeper than that. If you are looking for a massage deep enough to relax every fiber of your being, Ashiatsu is for you!