Japan's Shiho Oyama shared the top spot with compatriots Mamiko Higa and Yuki Ichinose on Saturday, all three with a one-shot lead after the second round of the $1.2 million LPGA Mizuno Classic in Shima, Japan.
Oyama, who started the day with a one-shot lead, shot her second straight 68 at the Kintetsu Kashikojima Country Club to finish tied at 8-under 136 with Higa and Ichinose, who both shot 66s.
"I came this far so I'm definitely going for it tomorrow," the 36-year-old Oyama said. "My caddie this week caddied for Lee Bo-Mee, and she won last week so I think the luck is on my side."
Oyama, a 12-time winner on the Japan tour but winless this season, had a chance to remain in the sole lead, but had her lone bogey of the day on the Par-4 15th hole.
The 20-year-old Higa, who has won twice in her first full season on the Japan tour, had six birdies in a bogeyless round, including three straight on holes 14th thru 16th.
Like Oyama, Ichinose could have had the lone lead but had a late bogey, with hers coming on the Par-3 17th hole, it was her first bogey of the tournament. The 25-year-old had moved to the top of the leaderboard early in the round with a birdie spree, carding six over the first 10 holes, with four straight from the seventh to 10th holes.
"I really enjoyed today's round with Mamiko Higa, if she makes birdie then I make birdie, it was just like that all day," Ichinose said.
The Japanese trio is one stroke up on Asako Fujimoto and American Brittany Lincicome who are tied for fourth place at seven-under. Fujimoto shot a 67 while Lincicome, a five-time career winner with three top-10 finishes this season, had a 68.
Lincicome said that not playing in the final group means less pressure as she tries to end a two-year winless drought with a sixth career title.
"Not being in the last group, I think I play best or I've won the most from," said Lincicome, who was seventh in South Korea last month. "It will be fun to go out tomorrow. If I keep doing the same things I've done the last two days, it should be really close."
The host nation is looking for its 10th title in the 41-year history of the tournament, and first since Momoko Ueda won the second of her two crowns in 2011. By filling four of the top five spots, the prospects of a Japanese player taking home the $180,000 top prize are good.
South Korean Chella Choi and Jang Eun-Bi both shot 69s and were another shot back in a tie for sixth place with Japan's Junko Omote (69) and Japan tour regular Teresa Lu (68) of Taiwan.
Defending champion and Rolex Rankings No. 3, Stacy Lewis, is in a group of five tied at five-under. The American overcame a seven-stroke deficit in the final round last year, birdieing the last three holes for a 64 and a one-shot victory.
In that group is Japan's Yumiko Yoshida, who shot the low score of the day, a seven-under 65, to join Lewis at five-under. Also in that group are Japan's Miki Saiki (66), American Julieta Granada (68) and South Korea's Hwang Ah-Reum (68).
South Korea's So Yeon Ryu, Rolex Rankings No. 4, shot her second straight 71 and was in a large group in 22nd place at two-under.