The scores were level at 1-1 heading into the fourth end when China made the breakthrough and took a 3-1 lead, stretching it to 6-2 in the sixth.
And despite Japan never giving up it was China left celebrating at the end as they saw out the narrow victory, much to the delight of skip Bingyu Wang.
"This is so exciting," Wang said. "After our poor performances at the last two World Championships the Olympics seemed so far, far away but after the last shot it has now become true.
"We got a lot of chances and they made a lot of mistakes. We are ready to do everything for the Olympic Games, so we're so happy about that.
"Maybe this might be my last chance to go to the Olympics but we want Team China to stay there."
Despite losing to China Japan still had a second chance to reach Sochi 2014 as they faced off against Norway, who had beaten Germany in a tie-breaker to keep their own Olympic hopes alive.
And Japan made the most of the opportunity as they convincingly won 10-4.
The last men's spot for the Games was between the Czech Republic, who had lost their play-off game with Germany, and America who had beaten Korea to keep their dream alive.
And it was America who kept their cool as they won 8-5, booking their Olympic spot in the process.
America skip John Shuster said: "I was extremely happy to win the (USA) Olympic Trials, but to come here and win this and to finally say we’re Sochi bound is pretty special.
"We're going to enjoy this for a day or two and then get ready for Sochi.
"This team is the hardest working team I've ever played on. These guys work their tails off and they’re some of the best in the business.
"I'm extremely proud of how well our team has played the entire season and especially here when we had our backs against the wall."
© Sportsbeat 2013