The 24-year-old was cleared earlier this year by FIFA to switch his allegiance from England to the West African nation.
Lookman had featured for the Three Lions at the youth level.
“It was a tough decision. A decision I had to make because obviously, it was my country’s call.
“My parents are Nigerians and I came to Nigeria a lot of times growing up and Nigeria wasn’t new to me.
“Making decisions wasn’t a tough decision in terms of knowing where I was going. Coming into the team, the squad has been great. Everyone has been very receptive and welcoming. I love this group and the people,” Lookman told Complete Sports.
By Ifreke Inyang