Yazaki, the youngest member of the team at 19 years old, is a sophomore at Waseda University and has been standing out with his running skills and speed since his days at Toin Gakuen High School.
The scoreline might trick you into thinking Japan were brilliant today. They were anything but. A disjointed performance was made to look much better by an inflated scorecard.
Japan head coach Jamie Joseph has been forced to make a late change to his team to face Chile in Toulouse on Sunday, with captain Kazuki Himeno being forced to withdraw due to injury.
Japan coach Jamie Joseph has named 10 uncapped players in his 37-man squad for internationals against Australia, Ireland, Portugal and Scotland.
With the World Rugby U20 Championship potentially postponed or cancelled, RugbyPass take a look at the top 50 U20 players in the world currently.
Check out our take on the future stars of rugby as we look ahead to the new decade and the players that are ready to burst on to the scene.
All eight of the nations to make the knockout rounds of the 2019 Rugby World Cup will already be beginning to look at their transition plans for RWC 2023.
Japan have won over the hearts and minds of the rugby world with their displays at the RWC and here are the future stars who can sustain and build on that success.
A review of the tier two rugby nations' performances at the Rugby World Cup and what the future holds for them, as they head towards the 2023 RWC in France.
Japan have won their first three games at the Rugby World Cup and are building as a Test side. Don't make them beg for tier one inclusion in the next cycle.