In total, eight Japanese players sit inside the top 10 heading into Sunday.
Momoko Ueda leads Toto Japan Classic in search of third win at the event, which is world No. 1 Atthaya Thitikul scores 67 in the second round
The two-time winner of the event is in prime position heading to the weekend.
Japanese players pack the top of the leaderboard after the first round in Japan.