"The beauty of the Ranfurly Shield is it's open to anyone and you have to win it every time you play for it - everyone brings their A game," Cooper said.
"Just because we have it doesn't mean we own it, so we have to go and win it again."
Naholo, now free to play for his province, is the only change to the starting XV, with regular right wing Declan O'Donnell shifted to the bench.
"Waisake loves playing for Taranaki and is always asking the All Blacks coaches if he can be released to play," Cooper said. "It also allows Declan a bit of a rest as he's played a lot of minutes and had a heavy workload."
The teams:
TARANAKI - Mitchell Graham, Ricky Riccitelli, Angus Ta'avao (captain), Kane Thompson, Leon Power, Pita-Gus Sowakula, Lachlan Boshier, Toa Halafihi, Te Toiroa Tahuriorangi, Stephen Perofeta, Manasa Mataele, Sean Wainui, Seta Tamanivalu, Waisake Naholo, Marty McKenzie.
Reserves - Donald Maka, Jared Proffit, Reuben O'Neill, Fin Hoeata/Brad Tucker, Adrian Wyrill, Kylem O'Donnell, Charlie Ngatai, Declan O'Donnell.
MANAWATU - Fraser Armstrong, Hunter Prescott, Michael Alaalatoa, Tom Parsons, Jackson Hemopo, Heiden Bedwell-Curtis, Antonio Kiri Kiri, Brice Henderson, Kayne Hammington, Otere Black, Ambrose Curtis, Ngani Laumape, Jason Emery, Newton Tudreu, Kurt Baker.
Reserves - Tim Cadwallader, Tuki Raimona, Sean Paranihi, Liam Hallam-Eames, Harrison Brewer, Jamie Booth, Jade Te Rure, Te Rangatira Waitokia.