^ Too bad this's something only Okamoto himself can answer
Another scenario is before he left temporarily to pursue his studies , he already thought of leaving the group prior but it's hard to say
Anyway to me this feels like what happened to KAT-TUN years ago except in this case , Okamoto didn't left the group twice
But I will not be surprised down the road he will eventually leave J&A altogether but for now we'll see
Trying to pull off an Ikuta Toma will not be easy cos all the while Johnnys are mainly known for singing/dancing . Ikuta is the only if not rare exception he's known for acting in drama , movies & stageplays