Coach Rassie Erasmus admitted the Springboks were "really awful" in their unexpected defeat to the Wallabies in their Rugby Championship opener at Ellis Park.
Japan head coach Eddie Jones believes Springbok scrumhalf Grant Williams is the fastest No.9 in the game.
The two South Africa U18 squads have rotated extensively for their second-round matches of the U18 International Series in Boland Landbou near Wellington.
Springbok coach Rassie Erasmus named an exciting team for their opening Castle Lager Rugby Championship match against Australia at Ellis Park on Saturday.
South Africans Benhard Janse van Rensburg, Hanro Liebenberg and Jacques Vermeulen could become eligible for Steve Borthwick's England in time for the next Rugby World Cup.
Former Scotland coach turned pundit Matt Williams has drawn the ire of Springbok coach Rassie Erasmus once again.