Half centuries to Jonathon Dunn and Trevor Langa helped Vanuatu pile on 264 for 9 batting first against Samoa.
Samoan skipper Ben Mailata, Sean Cotter and Daniel Burgess each picked up two wickets.
But their run chase got off to a disastrous start when Sean Cotter ran himself out for a duck on the second ball of the innings.
Jelany Chilia was the pick of the bowlers, taking 3 for 26 from his ten overs, as Samoa were bowled out for 128.
Meanwhile Fiji overhauled Japan's total of 154 with five wickets and 11.2 overs to spare.