Collin Morikawa will take a two-shot lead into the second round of the Sony Open after carding an error-free 65, with Ireland's Graeme McDowell six shots off the pace.
McDowell, after a double-bogey on the second, regained his composure to card three birdies to finish one over after a 71.
Morikawa, starting on the back nine, birdied the 11th and 18th and picked up three shots on the way in to sit five under.
A chasing pack of four are snapping at his heels, Australian Matt Jones among them having recovered from a dropped shot on the par-three fourth while Ted Potter Junior, Ryan Palmer and Sam Ryder are also in the mix.
Ten players are tied for sixth on two under, while reigning champion Matt Kuchar is among those sharing 16th place a shot further back.
More than a dozen players were unable to complete their first rounds at the Waialae Country Club owing to darkness, Kramer Hickok the best-placed among them on one over through 16 holes.
