Forest may have had a disappointing campaign this time around, with the Reds looking set to finish in mid-table, but Al-Hasawi insists that his project was never going to be a short-term one.
The Kuwaiti owner says that injuries have been a reason behind their struggles this season, but he expects them to be challenging for promotion next term.
"We have faced three or four injuries to important players [this season], but we are still in the plan," Al-Hasawi said. "Maybe we need two years, or one year, we will try our best and we want to push hard next year.
"From the time we bought the club it is not an easy job to take Forest from the first, second or third year to the Premier League."
Forest have had to deal with long-term injuries to Andy Reid, Chris Cohen, Britt Assombalonga and Jack Hobbs this season and it is true that is has had a negative impact on their season.
The real reason they weren't able to make the play-offs, though, was due to a spell where they won just three times in 23 games.
It was a run of poor form which saw Stuart Pearce lose his job and, although Dougie Freedman has made an encouraging start at the City Ground, they have not been able to make up the ground to reach the top six.
At the moment Forest occupy ninth place in the Championship table and they are 13 points behind the play-off spots, meaning that there will plenty for them to work on next term.