Sunwolves rest their captain against Stormers
Hori, who played almost a full match in each of their nine outings to date, will play off the bench this week.
Coach Mark Hammett has given long-time back-up hooker Takeshi Kizu his first start of the season.
Centre Harumichi Tatekawa will take over the captaincy armband against the Cape Town-based franchise.
The staring XV shows two other changes.
Timothy Bond will start at lock – ahead of Hitoshi Ono – where he will partner Faatiga Lemalu in the second row.
The only backline change is at scrumhalf, where Atsushi Hiwasha starts in place of Kaito Shigeno.
Yuki Yatomi comes onto the bench as scrumhalf cover in the final change to the matchday 23.
Sunwolves: 15 Riaan Viljoen, 14 Akihito Yamada, 13 Derek Carpenter, 12 Harumichi Tatekawa (captain), 11 John Stewart, 10 Tusi Pisi, 9 Atsushi Hiwasha, 8 Ed Quirk, 7 Andrew Durutalo, 6 Liaki Moli, 5 Faatiga Lemalu, 4 Timothy Bond, 3 Shinnosuke Kakinaga, 2, Takeshi Kizu, 1 Masataka Mikami.
Replacements: 16 Shota Horie, 17 Ziun Gu, 18 Takuma Asahara, 19 Yoshiya Hosoda, 20 Taiyo Ando, 21 Yuki Yatomi, 22 Yu Tamura, 23 Mifiposeti Paea.
Date: Saturday, May 14
Venue: Singapore National Stadium, Singapore
Kick-off: 19.45 (13.45 SA time; 11.45 GMT)
Referee: Paul Williams (New Zealand)
Assistant referees: Mike Fraser (New Zealand), Shuhei Kubo (Japan)
TMO: Takashi Hareda (Japan)
