Nanadan (rather than Shishidan) is the number given to the rank of the 7th Degree Black Belt. Here Sensei Advincula holds an original Okinawan Certificate promoting him to this high Black Belt rank. Notice the red blocks of Chinese charaters impressed on the document. These are called "chops" and represent the Master's name and sometimes the style of karate practiced. While unwilling to accept the title, Advincula is actually Grand Master of
Isshinkai Karate Do (his direct preservation of the Shimabuku lineage and all it taught.) This would make him a 10th degree Black Belt or Judan or even Soke (inheritor of Shimabuku's pure system of Isshinryu.) His humility and honor, however, are always foremost in his life.