Japan hooker Atsushi Sakate said coordination in defense would be key when the Brave Blossoms collide with South Africa in the quarterfinals of the Rugby World Cup on Sunday.Sakate and lock Uwe Helu said Japan's preparation and fitness could be the difference, provided the Brave Blossoms execute their plan -- a key part of which is their approach to tackles."The double collision is the No. 1 focus as they have big forwards and backs," Sakate said Wednesday referring to the defensive system whereby two tacklers -- one low and one higher -- attack the ball carrier."When we set up in defense, …READ FULL ARTICLE