Amongst players also confirmed today is the 2011 New Zealand Open Champion Brad Kennedy, who lost in a play-off (along with Kiwi Ben Campbell) to Mike Hendry last year, and fellow proven Australians Andrew Dodt and Marcus Fraser.
Dodt is a two-time winner on the European Tour, where he still plies his trade, winning NZ$1.56m last year, which helped him to a world ranking well within the world top 200.
Fraser is a six-time European Tour winner, with earnings in Europe of around NZ$800,000 in 2017. He partnered Hend in the Australian team at the Rio Olympics, leading after two rounds and eventually finishing fifth.
They join PGA Tour star KJ Choi, Japan Tour standouts Chan Kim and Steven Han, defending champion Michael Hendry and fellow Kiwis Ryan Fox, Tim Wilkinson and Steven Alker to confirm their starts in Queenstown.
Tournament Director Michael Glading said the confirmation of Kim, Hend and Yang is a further considerable boost for the event.
"I am confident that 2018 will be the strongest field in our time staging this event," said Glading.
"We have been chasing KT to come to our tournament for three years now, while Scott Hend has been the standout player on the Asian Tour over the last few years. Having a recent Asian Tour money-winner, a recent Presidents Cup player, and a Major champion is a real coup for us.
"These guys are in the top 200 in the world and seriously good players."
The 99th New Zealand Open, which will boast an overall NZ$1.2 million prize purse, will be hosted at Millbrook Resort and The Hills near Queenstown on 1-4 March.