Action at the six-team tournament in Japan reached the final set of round robin matches in Nagoya's Nippon Gaishi Hall today.

The Rio 2016 gold medallists were crowned champions yesterday after claiming an unassailable lead at the top of the standings.

China defeated hosts Japan 25-22, 24-26, 25-18, 25-16 in the final match of the tournament to finish with five wins from five matches and 14 points.

The Asian powerhouse is now unbeaten in its last eight matches at the World Grand Champions Cup, a record run for the team in the competition, and have joined Brazil as the only reigning Olympic champions to win the World Grand Champions Cup.

"We are very happy to be the champions and I want to express my deep gratitude to my players and coaches," said Chinese coach An Jiajie.

"There is still room for improvement in critical areas and that will be our next challenge.

"It’s the first year of the new Olympic cycle, so this is an important year for us."

Brazil defeated the United States in straight sets to claim the silver medal.

The Americans started the day in second place but a 25-20, 25-23, 25-19 win for Brazil nudged them up the standings, leaving the US with bronze.

Russia, who suffered three losses in the competition, ended their campaign on a high as they registered a 25-19, 25-16, 25-21 win over South Korea to finish fourth overall.

Japan dropped to fifth while the Koreans finished last after losing all five of their matches.

China's Zhu Ting was named the tournament's Most Valuable Player.