Evaluate the Efficacy and Safety of the ADVAGRAF®

"Researchers must check the blood concentration of tacrolimus at each visit and adjust the dose to achieve the blood concentration maintaining at 5\~10ng/ml of study treatment. Duration of treatment The investigational product will be administered for 24 weeks. (The lowest blood levels shall be adjusted at the discretion of the researchers, taking a blood sample is carried out in the morning before administrated of Investigational Product)~Tacrolimus blood level is 3-10 ng/ml for 6 months prior to screening and during the maintenance therapy.~( ① -1day to enrollment : swich to the day before ADVAGRAF®, ② 0day to enrollment : the day swich to ADVAGRAF® )~Duration of treatment the investigational product will be administered for 24 weeks."