The Lions of Mesopotamia boss was left dissatisfied with his side's efforts, while opposing coach Paul Le Guen was happy to see Oman clinch another good point
The 2007 Asian champions came from a goal behind to claim the draw, which leaves them level with Australia and Oman on two points in Group B, while Japan have seven points from three games.
"I'm not satisfied with the result as we were hoping to get a win from the match," Zico told reporters afte the game.
He continued: "It was a hard match for both teams, but they failed to create good chances on the night and we failed to win. We produced a good performance in the second half, but our midfield didn't play well.
"Generally speaking, our team didn't have the performance that we were looking for."
Oman boss Paul Le Guen has seen his side respond after their opening 3-0 loss away to Japan, by claiming a 0-0 home draw with Australia and a useful win on the road against Iraq.
"We are still in competition and I congratulate the players for this result because we were under a lot of pressure in the three matches that we have played in the competition," the Frenchman said.
"We still have a long way to go and hopefully we can finish at least third in the group to battle for a place in the 2014 World Cup."