Tokyo - Matt Lucas scored a late conversion on Sunday to give Australia a 28-26 win over Samoa in the final of the Tokyo Sevens.
Lucas slotted a long-range conversion with 23 seconds remaining after Australia captain Ed Jenkins crossed to level the scores.
New Zealand remained first in the overall IRB Sevens world series after seven of nine tournaments. The New Zealanders have 128 points, Fiji are second with 122, and third-placed South Africa have 105, one point ahead of England.
Earlier, Alatasi Tupou scored a sudden death extra time try as Samoa beat New Zealand 17-12 in the semi-final.
Australia beat England 33-12 in the other semi-final after getting 11 points from Allan Fa'alava'au.
New Zealand took third place when they beat ENgland 24-17 in the third-place playoff.
Results on Sunday on the final day of Tokyo Sevens:
Cup
Quarter-finals
New Zealand 40, Argentina 5
Samoa 24, Fiji 21
Australia 21, Wales 14
England 21, South Africa 17
Semi-finals
Samoa 17, New Zealand 12
Australia 33, England 12
Third Place
New Zealand 24, England 17
Final
Australia 28, Samoa 26
Plate Final
Fiji 14, South Africa 10
Bowl Final
France 17, United States 12
Series Standings (After 7 of 9 tournaments):
1. New Zealand 128 points. 2. Fiji 122. 3. South Africa 105. 4. England 104. 5. Samoa 101. 6. Australia 84. 7. Wales 71. 8. Argentina 67, 9. France 65. 10. United States 37.