The New Zealand-born and Australian National Rugby League (NRL) prop of the year Kasiano was eligible for both sides and had been at the centre of a tug-of-war between the Kiwis and Kangaroos for the past year.
However, the 22-year-old confirmed shortly before the New Zealand squad was named Tuesday that his allegiance lay with New Zealand.
"The selectors are very happy that Sam wants to be in the Kiwi team," New Zealand Rugby League's high performance manager Tony Kemp said.
Kasiano joins Manly's Dean Whare as the new faces in the squad for the Test in Townsville on October 13. Melbourne Storm second-rower Kevin Proctor is also uncapped, though he toured with the Kiwis to the United Kingdom last year.
Kasiano and Proctor are among seven players who appeared in last weekend's NRL grand final when the Storm beat the Bulldogs 14-4.
Jesse Bromwich also played for the Storm while Greg Eastwood, Frank Pritchard, Krisnan Inu and Sam Perrett were with Kasiano in the Bulldogs side.
Benji Marshall from the Wests Tigers will again captain the team while Shaun Kenny-Dowall (Roosters) Jason Nightingale (Dragons) and Kevin Locke (Warriors) were not considered because of injury.
New Zealand squad: Gerard Beale (Brisbane Broncos), Jesse Bromwich (Melbourne Storm), Greg Eastwood (Canterbury Bulldogs), Kieran Foran (Manly Sea Eagles), Josh Hoffman (Brisbane Broncos), Krisnan Inu (Canterbury Bulldogs), Shaun Johnson (Warriors), Sam Kasiano (Canterbury Bulldogs), Issac Luke (South Sydney Rabbitohs), Simon Mannering (Warriors) Benji Marshall (Wests Tigers), Ben Matulino (Warriors), Sam McKendry (Penrith Panthers), Sam Perrett (Canterbury Bulldogs), Frank Pritchard (Canterbury Bulldogs), Kevin Proctor (Melbourne Storm), Jeremy Smith (Cronulla Sharks), Elijah Taylor (Warriors), Dean Whare (Manly Sea Eagles).
Australia squad: Billy Slater (Melbourne Storm), Darius Boyd (Newcastle Knights), Josh Morris (South Sydney Rabbitohs), Greg Inglis (Canterbury Bulldogs), Brett Morris (St George Illawarra Dragons), Johnathan Thurston (North Queensland Cowboys), Cooper Cronk (Melbourne Storm), Matt Scott (North Queensland Cowboys), Cameron Smith (Melbourne Storm - capt), James Tamou (North Queensland Cowboys), Greg Bird (Gold Coast Titans), Paul Gallen (Cronulla-Sutherland Sharks), Nate Myles (Gold Coast Titans), Robbie Farah (Wests Tigers), Ryan Hoffman (Melbourne Storm), David Shillington (Canberra Raiders), Tony Williams (Manly Warringah Sea Eagles), Ben Te'o (Brisbane Broncos).