Yes, it's possible. However, if you request it because you think stiffness of the shoulder will be relieved by a Shiatsu treatment on the shoulder only, that shows your lack of understanding. Stiffness of the shoulder is a symptom and a barometer to see your body conditions, you need to have a total body treatment of Shiatsu at the same time relaxing the shoulder area. A concentrating Shiatsu treatment on the shoulder makes you feel better occasionally, but it repeats to occur again and again, the stiffness will be gettig much more stubborn, unless you are treated your body in total. Please do overwhole maintenace for your body sometimes if you want to keep it long.