Extra innings is a tie-breaking procedure in baseball and softball where play continues beyond the standard regulation length (nine innings in MLB, seven in high school/softball) until a winner is determined. The game ends when the visiting team takes the lead after a completed inning, or when the home team scores the winning run in the bottom half—a scenario known as a "walk-off" win, which typically ends the game instantly, except for a walk-off home run where all runners score. Interestingly, home teams win about 52% of extra-inning games (1957–2007), a slightly smaller advantage than their overall 54% win rate in regulation. In Asia, leagues impose limits to avoid marathon games: NPB and CPBL cap games at 12 innings (declaring a draw), while the KBO will adopt an 11-inning limit starting in 2025. Additionally, NPB regular-season games have a 210-minute time limit, and the Japan Series has progressively shortened its postseason allowance from 18 innings (1987–1993) to 15 (1994–2017) and now 12 since 2018.