Karate Survivor in Another World Vol. 2 (manga)

Kickin' Back In The Big City

After fighting his way through a goblin-filled forest, the nomad known as Nozaki has finally reached civilization. Thanks to his karate skills and knowledge of Earth's technology, the local adventurers' guild accepts him, and he quickly joins the most powerful party in the region. It's a second chance in a new world, and it's time for Nozaki to kick off a new, and thrilling, life of adventure!