Kiradech Aphibarnrat, Hideki Matsuyama, Daisuke Maruyama and Wu Ashun have all secured places at this year's Open Championship at Muirfield.
Thailand's Aphibarnrat carded a sparkling nine-under-par 63 in Friday's second round of qualifying at Amata Spring Country Club in Bangkok to move to 13 under par overall - four shots ahead of his nearest challenger.
Japanese amateur Matsuyama, who shared the overnight lead, had a strong front nine but looked to have put his chances of a top-four finish in jeopardy by bogeying the 14th and 16th holes and double-bogeying 17.
However, birdies on 15 and 18 boosted his second-round score to a three-under 69 which, coupled with his opening 66, saw him end at nine under to claim second spot.
Matsuyama's compatriot Maruyama had it all to do after signing for a 71 yesterday, but produced a superb round of 65 to surge up the leaderboard for a share of third place alongside China's Wu.
Wu, whose only blemish over the two rounds was a double-bogey six at the ninth hole today, posted a second straight four-under 68.
Spain's Javi Colomo (67), Thailand's Panuphol Pittayarat (67), Indonesia's Rory Hie (70) and Japan's Masahiro Kawamura all finished six under and just missed out.
Siddikur Rahman, bidding to become the first Bangladeshi ever to qualify for the Open, blew his prospects by dropping three shots over the final four holes to end as one of eight players - including Ireland's Niall Turner (68) - a stroke further back on five under.
Stephen Lewton (73) was the top Englishman on one under, with Scotland's James Byrne (76) two over. Grant Jackson registered a second-round 80 to finish eight over, while his fellow Englishman Miles Tunnicliff withdrew from contention.
