Having started on the bench, Katsumi scored in the 34th minute while Haitian winger Norde clinched the issue in the 62nd minute.
It was Katsumi was brought down by Allan Dias down the right and Japanese took the free-kick. His shot was parried away but Norde finished it, making amneds for his earlier misses.
The goalpost came in the way of Bagan's third in the 75th minute after Norde stormed down the left wing before coming inside and setting Katsumi free.