Ryoto Furuya leads after the first round of the 61st Porter Cup, firing an opening round of 64 (-6) on Wednesday.
Three other amateur golfers are one stroke back of Furuya. Peter Knade, Austin Hitt and Josh Whalen are all 5-under.
Five players are tied for fifth after shooting an opening round of 67 (-3).
Second round action at Niagara Falls Country Club begins Thursday morning.