Kamiji assumed uniform number 2 from autumn of his junior year, but handed it over to freshman Yoshio Koyama (currently with the Chunichi Dragons) because of a serious injury to his right elbow during practice.
By this time, Daisuke Matsuzaka had made world headlines in the pros, and it was reported in several Japanese sports journals that his "former wife" had debuted as an actor.
Hexagon II, Takeshi Tsuruno and Naoki Nokubo, Kamiji was a member of a musical unit called Shuchishin.
Since then, Kamiji has recorded and released music under the simply Yusuke (遊助, Yūsuke, written differently from his legal name).
In 2008, Kamiji's blog was officially recognized by the Guinness Book of World Records for the most unique visitors to the page in a 24-hour period.