The world’s third-ranked golfer opened his round with three consecutive birdies and added six more at the Royale Jakarta Golf Club, along with two bogeys.
Arnond Vongvanij shot 67 for second place.
Six golfers were another shot back in a tie for third, including Jyoti Randhawa and Shiv Kapur.
Westwood took last week off after finishing third at the Masters Tournament.
“I had a break last week and hardly hit any balls,” he said. “I played a lot of golf earlier this year and needed a rest. It was good to go home and recharge my batteries because the Masters always takes a lot out of you.”
EUROPEAN/ONEASIA TOURS: In Tianjin, China, Matthew Baldwin took advantage of calm early conditions to shoot 7-under-par 65 and lead the China Open by one stroke after the first round.
Joost Luiten, Gary Boyd, Scott Strange, Jean Baptiste Gonnet, Fredrik Andersson Hed and Jbe Kruger were at 66.
Former European Ryder Cup captain Colin Montgomerie shot 68 for his best round this year.
LPGA TOUR: In Kapolei, Hawaii, Azahara Munoz shot 8-under-par 64 to claim a share of the early second-round lead in the LPGA Lotte Championship.
Munoz had seven birdies, an eagle and a bogey in her second round.
She’s tied at 136 with Ai Miyazato (65) and Cristie Kerr (68). First-round leader Beth Bader followed her opening 68 with 77 to fall off the pace,
Top-ranked Yani Tseng is five shots off the pace after rounds of 69-72. Tseng has won three of the first six events this year.
TIGER TALK: Tiger Woods’ swing coach says criticism of his client is getting out of hand.
“I know everyone has a job to do, and I get it,” Sean Foley said this week on Fairways of Life, a radio show on XM Sirius.
“But if it is about the game of golf, Tiger Woods is an extremely important part of the game, and I think everyone understands that. It has just gotten to the point where the tearing down of Tiger as a person and a golfer has become just too much. I think it is just out of hand.”
Woods tied for 40th at the Masters, yet most of the attention was on how Woods kicked his golf club after missing a tee shot on the 16th hole of the second round.
A few days after the Masters, former Ryder Cup captain Paul Azinger said on Sirius XM that Woods’ antics were an “embarrassment to the game, to the membership at Augusta.”
Azinger has long been a supporter of Woods.