Translation guide
In baseball, extra innings are played when the score is tied after the regulation nine innings. Japanese uses the borrowed term 延長戦 (enchōsen) or the more specific 延長イニング (enchō iningu).
The period of play added when a baseball game is tied after nine innings.
Standard term for 'extra innings' or 'overtime game' in baseball. Literally 'extended game'.
試合は延長戦に入った。
The game went into extra innings.
延長戦の末、チームが勝った。
The team won after extra innings.
More direct translation, literally 'extended innings'. Used in baseball contexts.
延長イニングで逆転した。
They came from behind in extra innings.
Less common, literally 'extended inning(s)'. Sometimes used in sports reporting.
延長回の攻防が続いた。
The battle continued in extra innings.
延長戦 is the standard word for extra innings in Japanese baseball. It can also refer to overtime in other sports, but context usually makes it clear.