World champion Rose Chelimo has won the Asian Games women's marathon for Bahrain in a hot and humid race in the Indonesian capital.

The Kenya-born Chelimo had a big lead by the 30-kilometer mark and won in 2 hours, 34 minutes and 51 seconds.

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Bahrain's Rose Chelimo competes at women's marathon during the athletics competition at the 18th Asian Games in Jakarta, Indonesia, Sunday, Aug. 26, 2018.

Bahrain's Rose Chelimo competes at women's marathon during the athletics competition at the 18th Asian Games in Jakarta, Indonesia, Sunday, Aug. 26, 2018.

Japan's Keiko Nogami reacts as she crosses the finish line in second place in the women's marathon during the athletics competition at the 18th Asian Games in Jakarta, Indonesia, Sunday, Aug. 26, 2018. (AP PhotoBernat Armangue)

Japan's Keiko Nogami reacts as she crosses the finish line in second place in the women's marathon during the athletics competition at the 18th Asian Games in Jakarta, Indonesia, Sunday, Aug. 26, 2018. (AP PhotoBernat Armangue)

North Korea's Kim Hye Song crosses the finish line in third place during the women's marathon at the athletics competition at the 18th Asian Games in Jakarta, Indonesia, Sunday, Aug. 26, 2018. (AP PhotoBernat Armangue)

North Korea's Kim Hye Song crosses the finish line in third place during the women's marathon at the athletics competition at the 18th Asian Games in Jakarta, Indonesia, Sunday, Aug. 26, 2018. (AP PhotoBernat Armangue)

South Korea's Choi Kyungsun rests on the track after completing the women's marathon during the athletics competition at the 18th Asian Games in Jakarta, Indonesia, Sunday, Aug. 26, 2018. (AP PhotoBernat Armangue)

South Korea's Choi Kyungsun rests on the track after completing the women's marathon during the athletics competition at the 18th Asian Games in Jakarta, Indonesia, Sunday, Aug. 26, 2018. (AP PhotoBernat Armangue)

South Korea's Choi Kyungsun, left, embraces teammate Kim Doyeon after the women's marathon during the athletics competition at the 18th Asian Games in Jakarta, Indonesia, Sunday, Aug. 26, 2018. (AP PhotoBernat Armangue)

South Korea's Choi Kyungsun, left, embraces teammate Kim Doyeon after the women's marathon during the athletics competition at the 18th Asian Games in Jakarta, Indonesia, Sunday, Aug. 26, 2018. (AP PhotoBernat Armangue)

Thailand's Jane Vongvorachoti reacts after finishing the women's marathon during the athletics competition at the 18th Asian Games in Jakarta, Indonesia, Sunday, Aug. 26, 2018. (AP PhotoBernat Armangue)

Thailand's Jane Vongvorachoti reacts after finishing the women's marathon during the athletics competition at the 18th Asian Games in Jakarta, Indonesia, Sunday, Aug. 26, 2018. (AP PhotoBernat Armangue)

Chelimo represented Kenya internationally before switching to represent Bahrain ahead of the 2016 Olympics in Rio de Janeiro, where she finished eighth.

Bahrain's Rose Chelimo competes at women's marathon during the athletics competition at the 18th Asian Games in Jakarta, Indonesia, Sunday, Aug. 26, 2018.

Bahrain's Rose Chelimo competes at women's marathon during the athletics competition at the 18th Asian Games in Jakarta, Indonesia, Sunday, Aug. 26, 2018.

She won the world championship title in London last year.

Keiko Nogami won Japan's second straight silver, holding off North Korea's Kim Hye Song and finishing more than 1 ½ minutes behind Chelimo.

"It's a silver medal so there's still room for improvement," Nagomi said. "I hope to use this as a springboard."

Japan's Keiko Nogami reacts as she crosses the finish line in second place in the women's marathon during the athletics competition at the 18th Asian Games in Jakarta, Indonesia, Sunday, Aug. 26, 2018. (AP PhotoBernat Armangue)

Japan's Keiko Nogami reacts as she crosses the finish line in second place in the women's marathon during the athletics competition at the 18th Asian Games in Jakarta, Indonesia, Sunday, Aug. 26, 2018. (AP PhotoBernat Armangue)

Japan picked up its first men's Asian Games marathon gold medal in 32 years on Saturday when Hiroto Inoue held off his Bahraini rival Elhassan Elabbassi in a sprint finish in the first final of the track and field program at Jakarta.

North Korea's Kim Hye Song crosses the finish line in third place during the women's marathon at the athletics competition at the 18th Asian Games in Jakarta, Indonesia, Sunday, Aug. 26, 2018. (AP PhotoBernat Armangue)

North Korea's Kim Hye Song crosses the finish line in third place during the women's marathon at the athletics competition at the 18th Asian Games in Jakarta, Indonesia, Sunday, Aug. 26, 2018. (AP PhotoBernat Armangue)

South Korea's Choi Kyungsun rests on the track after completing the women's marathon during the athletics competition at the 18th Asian Games in Jakarta, Indonesia, Sunday, Aug. 26, 2018. (AP PhotoBernat Armangue)

South Korea's Choi Kyungsun rests on the track after completing the women's marathon during the athletics competition at the 18th Asian Games in Jakarta, Indonesia, Sunday, Aug. 26, 2018. (AP PhotoBernat Armangue)

South Korea's Choi Kyungsun, left, embraces teammate Kim Doyeon after the women's marathon during the athletics competition at the 18th Asian Games in Jakarta, Indonesia, Sunday, Aug. 26, 2018. (AP PhotoBernat Armangue)

South Korea's Choi Kyungsun, left, embraces teammate Kim Doyeon after the women's marathon during the athletics competition at the 18th Asian Games in Jakarta, Indonesia, Sunday, Aug. 26, 2018. (AP PhotoBernat Armangue)

Thailand's Jane Vongvorachoti reacts after finishing the women's marathon during the athletics competition at the 18th Asian Games in Jakarta, Indonesia, Sunday, Aug. 26, 2018. (AP PhotoBernat Armangue)

Thailand's Jane Vongvorachoti reacts after finishing the women's marathon during the athletics competition at the 18th Asian Games in Jakarta, Indonesia, Sunday, Aug. 26, 2018. (AP PhotoBernat Armangue)