最佳九人
Nishioka had a breakout year in 2005, starting as a backup infielder but starting at both second base and shortstop alongside veterans Koichi Hori and Makoto Kosaka in an unorthodox platoon system as the season went on. He hit just .268 but led the Pacific League in triples (11) and stolen bases (41), playing a key role in the Marines' first Japan Series championship since 1974. His splitting time between the two middle infield positions created an unusual situation in which he won the Pacific League Best Nine Award at shortstop and the Golden Glove Award at second base (incidentally, double-play partners Hori and Kosaka were awarded the Best Nine Award at second base and the Golden Glove Award at shortstop, respectively).