PSLS answers your Ni no Kuni questions, saying:
"I’ve noticed a lot of people don’t know much about Ni no Kuni, so here’s a helpful FAQ. If you have a question of your own, feel free to ask in the comments.
Q: Is this game easy?
A: Overall, no. It has easy parts and hard parts. Most of the first 15 hours will be very easy for seasoned gamers who have played RPGs for 20 years, yes. But after a while, you’ll find that there are some very big challenges in Ni no Kuni‘s boss fights and even random encounters. If you move at a normal pace through the story, the difficulty will be hover around a moderate level."