Big names return for Sunwolves
Centre Timothy Lafaele has been named as captain, with regular captain Edward Quirk named on the bench.
The Sunwolves welcome back five players in their matchday 23. Takeshi Hino, Keisuke Uchida, Kenki Fukuoka, Shota Emi, and Ryohei Yamanaka all return after most of them have been playing for the Japan team in Asian Rugby Championship.
Returning from injury and conditioning includes star backs Shota Emi and Kenki Fukuoka, who will both provide speed and strong finishing from the outside.
Takeshi Kizu, Heiichiro Ito, Hayden Cripps, Fumiaki Tanaka and Teruya Goto have returned home due to injury and will miss the clash.
Sunwolves: 15 Kotaro Matsushima, 14 Shota Emi, 13 William Tupou, 12 Timothy Lafaele (captain), 11 Kenki Fukuoka, 10 Yu Tamura, 9 Yuki Yatomi, 8 Willem Britz, 7 Shunsuke Nunomaki, 6 Rahboni Warren Vosayaco, 5 Uwe Helu, 4 Sam Wykes, 3 Yasuo Yamaji, 2 Yusuke Niwai, 1 Koki Yamamoto.
Replacements: 16 Takeshi Hino , 17 Keita Inagaki, 18 Takuma Asahara , 19 Shinya Makabe, 20 Edward Quirk, 21 Keisuke Uchida, 22 Jumpei Ogura, 23 Ryohei Yamanaka.
Date: Saturday, May 6
Venue: Velez Sarsfield, Buenos Aires
Kick-off: 18.40 (15.40 GMT; 06.40, Sunday, May 7 Japan time)
Referee: Jaco van Heerden (South Africa)
Assistant referees: Jaco Peyper (South Africa), Damian Schneider (Argentina)
TMO: Santiago Borsani (Argentina)
