Wimpie joins Hattingh in Sunwolves second row
In the backline, Semisi Masirewa gets the No.15 jersey, while Kenki Fukuoka and Hosea Saumaki swap the No.11 and No.14 jerseys on the wings.
Yutaka Nagare takes over from Fumiaka Tanaka at scrumhalf.
In the pack, Edward Quirk and Michael Leitch are the new flanks, while Wimpie van der Walt joins Grant Hattingh in the second row.
The front row remains the same.
Sunwolves: 15 Semisi Masirewa, 14 Kenki Fukuoka, 13 Timothy Lafaele, 12 Michael Little, 11 Hosea Saumaki, 10 Hayden Parker, 9 Yutaka Nagare, 8 Kazuki Himeno, 7 Edward Quirk, 6 Michael Leitch, 5 Grant Hattingh, 4 Wimpie van der Walt, 3 Takuma Asahara, 2 Shota Horie, 1 Craig Millar.
Replacements: 16 Yusuke Niwai, 17 Shintaro Ishihara, 18 Hencus van Wyk, 19 Uwe Helu, 20 Yoshitaka Tokunaga, 21 Fumiaki Tanaka, 22 Yu Tamura, 23 Jason Emery.
Date: Saturday, May 12
Venue: Prince Chichibu Memorial Stadium, Tokyo
Kick-off: 12.06 (03.05 GMT; 13.05 AEST)
Referee: Egon Seconds (South Africa)
Assistant referees: Akihisa Aso (Japan), Kawara Tasuku (Japan)
TMO: Minoru Fuji (Japan)