Jason Knutzon maintained his two shot lead at the half way point of the Panasonic Open golf tournament in Japan.
The 41-year-old American fired a two-under 69 on Friday to be at nine under and lead from a group of four players.
Won Joon Lee carded a 67 at Chiba Country Club to be the best-placed Australian in a tie for 11th at four under.
Brendan Jones, Terry Pilkadaris and Adam Bland are at one under after the second round while four other Aussies - Richard Green, Brad Kennedy, Kurt Barnes and Todd Sinnott - missed the cut.
Yujiro Ohori of Japan shot the day's lowest score of 65 to be tied second with Korean Hur In-hoi, Philippines' Juvic Pagunsan and Thailand's Panuphol Pittayarat.
The tournament is co-sanctioned by the Asian Tour and Japan Golf Tour.
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