Shin Hokuto no Ken S01

In a post-apocalyptic world, the water is completely poisoned, except for a small amount that has been preserved in a tank. A man named Sanga has created a confined region called "Last Land". A group of villagers manage to find pure water and Sanga desperately needs it. He and his group go after the villagers to kill them and steal the water. Meanwhile, a mysterious man suddenly appears and quickly takes out some of Sanga's men. His name is Kenshiro and with his martial arts skills, Hokuto Shinken, he is capable of defeating any man. Sanga will do anything to get the water and Kenshiro will do everything to stop him.