Known as the advanced level of traditional Thai massage techniques, Japsen is a therapeutic technique that is positioned outside of the usual relaxation massage category. If you do this at a general salon, you will think, "It hurts! It hurts!" In Thailand, massage therapists are called "Moon Nuat", which is different from ordinary therapists "Kon Nuat", but this Japsen is the technique used by Mo Nuat. It is a technique in which the thumb is pushed deep into the muscles and moved laterally to flick the tendons one by one. In conditions such as stiff shoulders and frozen shoulders, where pain has continued for a long time, you cannot expect an effect even if you provide a relaxation level massage, but even in such cases, you can reduce it by receiving this treatment several times That is certain. It is a traditional medicine massage skill for advanced users and recommended for therapists.