Mizuumi Amakawa 
Fushi no Kami: Rebuilding Civilization Starts With a Village (Manga) Volume 4 

With newfound determination in his heart, a boy flies free, leaving behind the nest of his hometown.

To start things off, Ash finds himself face-to-face with a hungry bear descended from the mountains! He barely scrapes a victory, but is also seriously injured. Wandering between the borders of life and death, he is saved by none other than the ancient wisdom that he himself deciphered and revived for his friends. However, finding that he is nearing the limits of what he can learn and accomplish in the village, Ash decides to go study abroad in the local capital. Thus, a new chapter of his journey begins! The boy who made a bevy of miracles happen in a sleepy little farming village is about to take another giant step for mankind in the fourth volume of this civilization-building series!