As for his plans after the series, he plans to challenge himself by doing more dramas and quiz shows in the future and even do voice acting. Iwanaga doesn't wait for someone to offer him a voice acting role, but he will animate his own project and perform the voice acting. The actor states that even if your physical appearance will change as you age, but your voice will remain in the memories of fans and cites Sailor Moon's voice actress, Kotono Mitsuishi as an example.
[Source: MantanWeb via Daisuki Toku]