Akinori Iwamura doubled home the go-ahead run in a four-run eighth as the Yakult Swallows came from behind to beat the Yokohama BayStars 5-2 at Jingu Stadium on Tuesday.
The Swallows have tied one and won seven of their last eight games.
Down 2-1 in the eighth, Roberto Petagine led off the inning with a single.