Two goals late in the first-half – from Kudo and an own goal by David Vrankovic – sent Reysol on their way to the win before goals from Kim Chang-soo, Kudo and Hidekazu Otani ensured the three points.
Kashiwa started well and Cristiano should have scored just four minutes but hammered his shot over the bar, four minutes later Yuki Otsu sent his effort wide from six-yards out.
In the 43rd minute, Kudo put the home side in front with a crisp finish to the goalkeeper’s left after a low, firm cross from the right by Cristiano.
Two minutes later, Tatsumi Yoshida’s team doubled their lead when Vrankovic headed into his own goal.
In the 56th minute the result was put beyond any doubt when Kim Chang-soo latched onto Akimi Barada’s perfectly weighted through ball before slotting home.
Kudo claimed his second of the game with a close range header in the 67th minute after Otsu glanced Barada’s corner across the face of goal while.
Otani found the back of the net when his shot from outside the area was deflected past substitute goalkeeper Bui Tan Truong to make the score 5-0.
In the 81st minute Oseni pulled one back for Binh Duong, but it was too late to spark an unlikely revival.