The unfancied South Korean pair claimed a thrilling 6-11, 15-13, 12-10, 16-18, 12-10 victory over Japan's Jun Mizutani and Mima Ito in the final at OMEGA Sports and Health Center.

The triumph gave Cho and Shin their maiden ITTF World Tour crown as a team.

"The final was very difficult," said Cho.

"Mizutani and Ito are very strong opponents. 

"But in the end, we played really well - we saved match point, and we won."

In the men's singles draw, third seed Timo Boll booked his place in the semi-finals with a battling seven-game win over South Korea's Lee Sang-su.

The German was 3-1 down but rallied to clinch a dramatic 6-11, 9-11, 15-13, 12-14, 11-9, 12-10, 11-8 triumph.

Boll will face Chinese Taipei's Lin Yun-Ju, who defeated Japanese qualifier Yuki Hirano 11-1, 11-9, 11-7, 11-7 in his semi-final.

Fourth seed and four-time Olympic medallist Dimitrij Ovtcharov is also through after he beat German team-mate Patrick Franziska 11-6, 13-11, 11-7, 12-10.

Top seed Kasumi Ishikawa of Japan progressed to the women's singles semi-finals with an 11-9, 11-6, 11-6, 7-11, 11-9 victory over He Zhuojia of China. 

Ishikawa will take on compatriot Miu Hirano, who edged out China's Liu Weishan 8-11, 7-11, 10-12, 11-8, 11-8, 11-8, 11-4.