The midfielder, who recently signed a three-year contract extension with the Fire Club, was a hot property for Steve Polack's side after playing a crucial role in Aduana's run to win the Ghana Premier League title last season.
“I was very close to joining Asante Kotoko but my parents insisted that I should continue with Aduana. Even though my father is a former player of Kotoko, he kicked against the move to his former side," Opoku told Nhyira FM.
“It got to a time and there was a misunderstanding between my parents. My father gave his blessings that I should continue with Aduana but my mum rejected that suggestions and preferred Kotoko but Aduana officials met her and explained issues to her after which they all gave me their blessings.
“They have been the brain behind my success and so whatever they say is what I adhere to. It was in the second round of last season that Kotoko coach Steve Polack told me that he needed my services at Kotoko next season.
He added: I'm however happy to stay and hope to play well to help Aduana retain the league title and perform creditably in the Caf Champions League."
Opoku joined Aduana in 2015 after bursting onto the scene at Bibiani Gold Stars following his heroics in the Ghana FA Cup.