Hammett tweaks team for Rebels
Takuma Asahara, Yoshiya Hosoda, Mifiposeti Paea have all been given their first starting berths in this year's tournament.
Paea comes in on the wing, while Asahara and Hosoda are the new faces in the forward pack.
The Sunwolves are yet to win a game in their debut season in Super Rugby.
Sunwolves: 15 Riaan Viljoen, 14 Akihito Yamada, 13 Harumichi Tatekawa, 12 Yu Tamura, 11 Mifiposeti Paea, 10 Tusi Pisi, 9 Atsushi Hiwasa, 8 Edward Quirk, 7 Andrew Durutalo, 6 Yoshiya Hosoda, 5 Timothy Bond, 4 Hitoshi Ono, 3 Takuma Asahara, 2 Shota Horie (captain), 1 Keith Inagaki.
Replacements: 16 Takeshi Kizu, 17 Masataka Mikami, 18 Shinnosuke Kakinaga, 19 Shinya Makabe, 20 Tomas leonardi, 21 Kaito Shigeno, 22 Derek Carpenter, 23 Yasutaka Sasakura.
Date: Saturday, March 19
Venue: Prince Chichibu Memorial Stadium
Kick-off: 13.15 (15.15 AEDT; 04.15 GMT)
Referee: Mike Fraser (New Zealand)
Assistant referees: Shuhei Kubo (Japan), Noriaki Hashimoto (Japan)
TMO: Takashi Hareda (Japan)