The Open champion carded five birdies to move to 10-under-par alongside Austrian Bernd Weisberger, with Japan's Daisuke Kataoka leading the way.
Kataoka's 66 was the best round of the day and despite him being likely to be put under massive pressure on Sunday, the 24-year-old says he's looking forward to the challenge.
"My putting was normal on the first two days but it was great today," he told reporters. "I never changed anything, somehow I just felt more confident with my putting. I've mastered the speed of the greens and that made my round slightly easier.
"This is the first time I'm leading a tournament. When I looked at the scores, I saw many good players chasing me so I hope to have some luck to win. It won't be easy," he added.
Elsewhere, Canadian Richard T Lee currently sits on nine-under, while Simon Dyson is the top Brit, although he is still six off the lead.