An information-processing apparatus, reproduction apparatus, communication method and computer program are disclosed wherein an evaluation value can be added automatically to contents stored in a storage apparatus or medium. The information-processing apparatus comprising an acquisition section which acquires, from a portable reproduction apparatus which is capable of reproducing contents data, reproduction history information of the contents data in the portable reproduction apparatus. An evaluation value arithmetic operation section arithmetically operates a computed evaluation value corresponding to the content data based on the reproduction history information acquired by the acquisition section. A transfer section transfers the computed evaluation value arithmetically operated by the evaluation value arithmetic operation section to the portable reproduction apparatus.