Nigerian midfielder Abdulrazaq Ishaq began pre-season training with Anderlecht last week.
The new signing joined his teammates to continue preparations for the upcoming season.
The 20-year-old midfielder was given a four-year contract by Anderlecht.
Swedish club IFK Norrkoping will receive a transfer fee of 4.5 Million Euros plus add-ons.
They are also entitled to a 20% sell-on.
The former Golden Eaglets star had a year left on his contract at Norrkoping.
This season, the ex-Unity Academy of Kaduna star played 10 matches and provided an assist for the Swedish club.
Anderlecht will play in the UEFA Europa League in the new season.