To recruit Hide Nakata you need level 60 and above, you also need to have beaten 360 minibattles, and 80 players in your team. Then:
Go to Inazuma Japan residence and talk to him in the second floor.
Go to the Japan's stadium and talk to him one more time.
Go to the Italy's area in the soccer field and talk to him. If your team is level master and has 80 players, he will challenge you in three matches. If you win, he gladly will join your team. Nakata is level 60.