Kim closed with a one-under 71 – following a bogey on the par-4 17th with a tap-in birdie on the par-5 18th – to finish at 11-under 277, two shots clear of Shibuno at breezy Hoakalei Country Club.

Kim earned $US300,000 ($A405,000) for her fifth LPGA Tour title.

Australians Stephanie Kyriacou and Sarah Kemp both carded final rounds of 73 to finish in a share of 26th place at even par for the tournament.

"There were a lot of expectations but also a lot of support coming from friends and family as well," said Kim, who won a major at age 19 in the 2014 Evian Championship.

"There have been ups and downs and I think I am at the up part right now and I feel very proud, a little confident about the future and the outlook looks bright for me and I feel like I can do better moving forward."

The 26-year old South Korean star had a three-stroke lead after both the second and third rounds and held off a final-round push from Shibuno, the Japanese player who a bogey-free 70.