If you're looking for anime similar to Legends of the Dark Kings: A Fist of the North Star Story, you might like these titles.
In the 21st century, an earthquake devastated Japan, destroying Tokyo and leaving its people homeless and lawless. In the present, the ruins of Tokyo are a haven for thugs and street gangs, the most powerful of which is the ruthless Koryukai gang. Takateru Suga is visiting Tokyo on a mission: to find his sister Kiyomi, but things heat up once he discovers she's been kidnapped by the Koryukai themselves! With the help of a transvestite, colonel-turned-monk and a lot of firepower, Takateru must help defeat the Koryukai and save the city, or lose everything he holds dear!
In the year 200X, World War III began. Special bombs destroyed parts of cities such as Tokyo, leaving decimation in their wake. Decades later, ground zero in Tokyo – an isolated section known as the Black Spot – remains an enigma. Its residents known as Needless possess strange powers such as the ability to control fire or telekinesis, and are constantly hunted down by Simeon, a large pharmaceutical company with sinister motives and Needless of their own to do their bidding. Young Cruz is part of a resistance to fight against Simeon and its Needless figurehead leader, Adam Arclight; but after the resistance is brutally killed by Simeon’s minions, he finds himself saved by a motley crew: Professor Gido, scantily-clad Eve and badass Blade. Together, the gang fends off Simeon’s attacks and tries to discover the truth behind the corporation’s actions. What is Simeon really after, and why do they desperately want to find Fragments?
In a post-apocalyptic Earth, the water has become entirely toxic, except for some kept safe in a reservoir. A fortified zone has been created by a man named Sanga, he calls it The Lastland. A group of villagers have discovered safe water, and Sanga wants it. He and his band of killers go to kill everyone and steal it. As they do a mysterious man apperes out of nowhere, instantly killing some of Sanga's men. His name is Kenshiro, and he can beat any man with his martial art, Hokuto Shin Ken. Sanga will do anything for the water, and Kenshiro will do anything to try and stop him.
The story is about a catastrophic future in which most of the world is destroyed after a nuclear war. Kenshiro, the next successor of the fighting style Hokutou Shinken, fights against one of the new world tyrants along with his friend Shu.
In a post-apocalyptic future, gangs of savage thugs prey on the fleeting remnants of civilization, raiding them for food and water in the endless wasteland the world has become. Humankind's only hope for the future may lie in a young girl with an amazing ability and in the only man powerful enough to protect her and punish evil--Ken, the Fist of the North Star!
Tadashi Matsushita has recently entered the Kansai Fifth Technical High School and joined its notorious karate club. There he meets his captain, Yoshiyuki Takagi, an incredibly strong individual. Feared and respected throughout Osaka, Takagi is deep down an honorable and compassionate guy despite his violent endeavors.