Saffa joins the Sunwolves camp
The 29-year-old, who plays for the Japanese Top League side Kubot Spear, will only participate in the pre-season camp.
Labuschagne played for the Free State Cheetahs before signing for the Blue Bulls in 2015.
The flank made 22 Super Rugby appearances for the Pretoria-based franchise.
Labuschagne was called up to the South Africa squad for the 2013 mid-year rugby union tests against Italy, Scotland and Samoa, however, he didn't feature in any of the matches.
Sunwolves: Takuma Asahara, Shintaro Ishihara, Keita Inagaki, Asaeli Ai Valu, Jiwon Koo, Ruan Smith, Craig Millar, Hencus van Wyk, Yusuke Niwai, Takeshi Hino, Jabo Bregvadze, Shota Horie, James Moore, Grant Hatingh, Kazuki Himeno, Uwe Helu, Shinya Makabe, Sam Wykes, Edward Quirk, Shunsunke Nunomaki, Wimpie van der Walt, Pieter Labuschagne, Yoshitaka Tokunaga, Willem Britz, Keisuke Uchida, Fumiaka Tanaka, Yu Tamura, Hayden Parker, Harumichi Tatekawa, Sione Teaupa, William Tupou, Timothy Lefaela, Ryoto Nakamura, Michael Little, Hosea Saumaki, Gerhard van der Heever, Kenki Fukuoka, Akihito Yamada, Lomano Lave Lemeki, Robbie Robinson, Kotara Matsushima, Kouki Arai.
