The talented first five Stephen Perofeta, now at Taranaki, but in his first year out of Wanganui Collegiate, from where he played for Wanganui and the national Heartland XV, wins promotion after being in the 2015 NZ Barbarians Schools.
New Zealand Under 20 head coach Scott Robertson said he was pleased with the talent available for the tournament, which will see them play two test matches against Australia early next month.
"The trial matches that we held last month were incredibly valuable for us as selectors and we got to see the players in that intense game environment, and we got to see how they responded to the pressure of playing and competing for places.
"While there are only the two countries, we have two tough test matches against a strong Australian team in this Oceania tournament. These will also provide us with a valuable sense of how they cope with playing intense matches in a compact window," he said.
Hurricanes hooker Apisai has been named captain of the side.
"Leni is just an impressive young man who leads a pack well on the field. He has already shown a maturity beyond his years, in the way he has stepped up to starting for the Hurricanes when veteran hookers Dane Coles and Motu Matu'u were ruled out injured at the start of the season."
The New Zealand Under 20 squad to compete in the June World Rugby Under 20 Championship in England will be named in May after the Oceania squad returns to New Zealand.
The squad assembles in Auckland on April 24 and will play a match against the Blues Development XV on April 28, before travelling to the Gold Coast for matches against Australia on May 3 and 7.
The squad is:
Forwards: Ayden Johnstone (Waikato), Mason Kean (Hawke's Bay), Shaun Stodart (Otago), Sean Paranihi (Canterbury), Alex Fidow (Wellington), Pouri Rakete-Stones (Hawke's Bay), Leni Apisai (c, Wellington/Hurricanes), Asafo Aumua (Wellington), Hamish Dalzell (Canterbury), Quinten Strange (Tasman), Sam Caird (Waikato), Isaia Walker-Leawere (Wellington), Fin Hoeata (Taranaki), Mitch Jacobson (Waikato), Luke Jacobson (Waikato), Dalton Papali'i (Auckland), Hapakuki Moala-Liava'a (North Harbour), Marino Mikaele-Tu'u (Hawke's Bay)
Backs: Jonathan Taumateine (Counties Manukau), Sam Nock (Northland/Blues), TJ Va'a (Wellington/Hurricanes), Stephen Perofeta (Taranaki), Jordie Barrett (Canterbury), Sio Tomkinson (Otago/Highlanders), Orbyn Leger (Counties Manukau), Jonah Lowe (Hawke's Bay), Malo Tuitama (Wellington), Peter Umaga-Jensen (Wellington), Mason Emerson (Hawke's Bay), Jordan Trainor (Waikato/Blues), Caleb Makene (Canterbury)
Waikato's Shaun Stevenson was not considered as the Chiefs require him in Super Rugby.
Players not considered due to injury: are: Matthew Lansdown (Waikato), Jahrome Brown (Waikato), Hugh Renton (Hawke's Bay), Ere Enari (Canterbury), Harrison Levien (Waikato), Lisati Milo-Harris (Auckland)