noun
starting player
Used in games and sports to refer to the player who starts the match or takes the first turn.
from English start player
このゲームでは、スタートプレイヤーが最初にカードを引く。
In this game, the starting player draws a card first.
スタートプレイヤーはサイコロを振って決める。
The starting player is decided by rolling a die.