Overview
The starting rotation is the system by which starting pitchers take turns on the mound at regular intervals, forming the backbone of a team's pitching strategy. NPB traditionally employs a six-man rotation, with each pitcher starting on six days' rest - a longer interval than MLB's standard five-man rotation (four days' rest), reflecting Japanese baseball's emphasis on arm preservation. Constructing the rotation is among the coaching staff's most critical tasks. The order is determined around the ace, factoring in left-right balance, pitch-type diversity, and matchup considerations against upcoming opponents. In-season adjustments due to injuries and slumps are frequent, and rotation stability correlates directly with team performance. Clubs whose six starters consistently deliver quality outings are perennial contenders. Recent innovations such as the opener strategy and bullpen days - where no traditional starter is used and relievers pitch in relay - have challenged conventional rotation thinking. However, NPB continues to place high value on durable starters who can pitch deep into games, and the rotation's centrality remains undiminished.