YOKOHAMA, Japan -- Defending champion South Korea lost to its bitter rival Japan 5-2 in the semifinals of the Tokyo Olympic baseball tournament on Wednesday.

The loss, however, doesn't mean the end of South Korea's run.

In the complicated double elimination tournament, South Korea has dropped into the loser's bracket and will play the United States at 7 p.m. Thursday for the right to reach the gold medal game.

The US defeated the Dominican Republic earlier Wednesday in a repechage game to stay alive in the tournament.

A loss in that Thursday game will send South Korea to the bronze medal game against the Dominican Republic.

In a tense and taut game that lived up to hype, Japan broke the 2-2 tie in the bottom eighth courtesy of a three-run double by Tetsuto Yamada.

South Korea wasted an opportunity to put pressure on Japan early. A leadoff walk and a one-out double had runners at second and third for the meat of the order. But cleanup Yang Eui-ji and No. 5 hitter Kim Hyun-soo both struck out swinging against Yoshinobu Yamamoto.

South Korea at least made the Japanese starter work. Yamamoto needed 27 pitches to get out of that opening frame.

Oh Ji-hwan got hit by a pitch from Yamamoto in the second inning but erased on a double play ball by Hur Kyoung-min.

Those missed opportunities haunted South Korea in the bottom third, when Japan scored the game's first run on Hayato Sakamoto's sacrifice fly.

After laboring through the first two innings, Yamamoto settled down to retire nine straight batters in one stretch.

Japan doubled its lead in the bottom fifth. After Tetsuto Yamada led things off with a double, Masataka Yoshida brought him home with a single up the middle.

South Korea finally solved Yamamoto in the top sixth, while also getting some help from shoddy outfield defense.

Park Hae-min opened the inning by dumping a single to shallow left. Left fielder Kensuke Kondoh booted the ball, allowing Park to take second.

Kang Baek-ho then singled to left to score Park from second. Kondoh's throw would have beaten Park at the plate, had the ball not skipped past catcher Takuya Kai and rolled to the backstop.

Lee Jung-hoo extended the rally with a single to deep right field, and South Korea now had runners at the corners for Yang Eui-ji.

Yamamoto struck out Yang but gave way to left-hander Suguru Iwazaki, with three left-handed batters due up for South Korea.

The first of those, Kim Hyun-soo, drove in the tying run with a single. Though the next two batters struck out, it was now a new ball game. (Yonhap)