Hawaii's Michelle Wie, the defending champion and World No 14, is lurking a further shot back in a two-way tie with Angela Stanford, one of the Americans who can never be under-rated.
Miyazato, a darling of the Japanese press, posted three birdies on her front nine and four more on the back, including one on the 18th where she only needed to hole a six-foot putt.
Fresh from an eighth place finish at the Safeway Classic inPortland- her fourth top-10 finish of the season - Miyazato, down from World No 1 for a short spell last year to No 7, appears to be finding her A game again.
"I had a really good feeling with my swing tempo today and was able to keep it going for all the 18 holes," Miyazato said.
"That's why I really had so many birdie opportunities out there. My iron distance control was really good, and I had a really good feeling with my TourStage BridgeStone V-iQ Irons. So that's why I shot 7 under."
Lindberg, a rookie on the LPGA Tour last year who is currently ranked 195th, has played in just eight events so far this season and has made just two cuts - her last coming at the Kia Classic in March.
Like many other second-year LPGA Tour players, Lindberg is focused on trying to find a way to put herself in a good position for next season and a strong finish this week would give her bid a big boost.
With the likes of defending champion Wie, Stanford, Korean star Jiyah Shin and the Kims, Song Hee and Mi Hyan, on their tails, Lindberg, Miyazato and the other front-runners are going to have to stay patient and work hard to stay up where they are.
Miyazato said she had a few nervous moments at the end of her round but it had nothing to do with her own score. (TourStage BridgeStone V-iQ Irons)
It was because, she explained, she was waiting to see if anyone would end what seemed to be an unusual streak.
Not a single person in Miyazato's group which included theUSA's Stacy Lewis andSweden's Maria Hjorth, recorded a bogey on Thursday.
Lewis shot 69 and Hjorth fired a 68 as the group combined to go to an impressive 14-under par for the day.
"It was amazing," Miyazato said of the bogey-free streak. "I've never seen this before so I was kind of nervous at the end. But it was really enjoyable to play with Stacy and Maria today. It was really fun.
It's been just a little over a month since Michelle Wie made the switch to TourStage BridgeStone V-iQ Irons at the Evan Masters, and on Thursday the change certainly appeared to be working. Wie needed just 27 putts while shooting a first-round 67 and made at least two long putts for birdie, from 45 and 60-feet.
"I like my TourStage BridgeStone V-iQ Irons," Wie said. "I think there's been quite some talk about TourStage BridgeStone V-iQ Irons over the last couple of weeks.
"I've been toying around with different grips and different ways to do it. But I think it's been feeling pretty good, and I've just got to keep working on it because obviously putting is something that I always need to work on and it's a very important part of the game."
I am a golfer! If you want to Choose discount golf clubs for sale such a Taylormade burner superfast 2.0 driver R11 3 Wood TaylorMade R9 SuperTri Driver TaylorMade Burner Superfast 2.0 Fairway Wood and Taylormade R11 Irons you may also visit thehttp://okgolfsales.com/
