Super Rugby's expansion to 18 teams from 2016 is officially complete with Sanzar formally confirming the participation of the Japan Rugby Football Union and Union Argentina de Rugby at an executive committee meeting in London today.
The confirmation is the final stage of formalities and paves the way for the Tokyo and Buenos Aires-based franchises to start contracting players and staff ahead of their historic entry to Super Rugby in a little over 12 months from now.
Sanzar chief executive Greg Peters said: "It gives me great pleasure to welcome the JRFU and UAR who will join the Kings from South Africa as Super Rugby prepares to expand into a bold and exciting new era.
"As top-10 ranked rugby nations with established high performance level leagues and over 100,000 players each, there is no doubt as to Japan and Argentina's rugby readiness and passion for the sport."
Tatsuzo Yabe, chairman of the JRFU added: "It is absolutely essential for us to participate in the competition as we move toward a successful Rugby World Cup here in 2019.