Rapid-Fire Fisticuffs: The Hokuto Hyakuretsuken, one of the main character's signature moves. Oddly enough, Hokuto Ujoumoushouha is just that except ending with a "merciful" gut punch instead of Your Head A Splode.
Razor Floss: One of the Golan commandos wields this. At one point he stretches it taut and runs past a man, which cuts the man in half. Raiga and Fuga's martial art, Nishin Furaiken, also used these.
Razor Sharp Hand/Razor Wind: Nanto Seiken uses a combination of both - rapid movements of the hands and feet create razor-sharp 'blades' of air pressure, letting practitioners cut off heads with their hands, poke their fingers through ribcages and slice dozens of enemies apart with a single spinning kick. Hyui, the wind-themed member of the Nanto Gohasei, has a similar style that uses pure long-ranged Razor Wind, whilst Hokuto Shinken practitioners like Raoh can also cut people in half with their hands and feet, but through raw strength rather than manipulation of air currents.
"The Reason You Suck" Speech: Shin delivers a magnificent, textbook speech to Ken during a flashback, right down to having him pinned down underfoot. The topic was obsession, and Ken took it to heart.
Redemption Equals Death: Quite a few do not long survive their (barely) "face" turns, though the manga-only Baran goes further than usual in the first chapter of the final volume in not only choosing to die, but arranging for a public execution — and thus humiliation — and actually letting himself be killed, though his final moments are spent in the presence of his redeemers.
Also notably Duran during the filler episodes in the Shin arc; he is a doctor of the village who makes sure he helps the people as much as possible, seeing how he used to work for one of Shin's henchmen, Dante. Duran is then faced by Dante's thugs who threaten to kill him unless he kills Kenshiro. He of course fails and he is impaled by several spears — right in front of the girl who wanted to be his wife when she grew up.
Rescue Arc: Pretty much the entirety of the Southern Cross arc (especially in the anime version). The constant kidnapping of Lin during the Kingdom of Shura arc also qualifies.
Retcon: The original series had Kenshiro, the 64th Hokuto Shinken successor, be the very second Hokuto Shinken praticioner to perform the ultimate Musou Tensei art, the first was the Hokuto Shinken founder himself, and the third to use it was Raoh. Comes Souten No Ken and Kenshiro's uncle Kasumi, the 62nd Hokuto Shinken successor, performs the Musou Tensei against Liu Zong-Wu, being created by the original authors themselves it didn't get pushed into Alternate Continuity territory.
Rewarded as a Traitor Deserves: There's a bridge where Raoh's thugs have checkpoints at both ends to search for Kenshiro, so Kenshiro attempts to evade them by hiding in a wagon of straw that his ally Fudo pulls across the bridge. The thugs have drafted villagers to do their searching for them, and one of these villagers at the entrance of the bridge spots Kenshiro, but deliberately pretends that he didn't see him. By the time Fudo gets to the other end of the bridge, another villager has ratted out the villager who has covered for Kenshiro, hoping to be humbly rewarded with food and such. However, both villagers are killed by Raoh's thugs, one for helping Kenshiro, and the other for ratting out the first villager!
Rummage Sale Reject: Even if the 1980's did have pretty awful clothing, is this the best that the cast can come up with?
Samus Is a Girl: When we find out that the Last General of the Nanto Roku Seiken is Yuria. Also, when we learn that the Celestial Emperor is actually an Empress, and is in fact Lin's estranged twin sister, Lui.
Say My Name: Invoked (whether deliberate or not remains to be told) by Dirty Coward Jagi, whose Catchphrase is actually "Say my name!" Shotgun pointing is optional. This was even made into a super move in the Atomiswave fighting game.
Screw Destiny: Pulled off in awesome fashion by Rei in his final days. The Star of Death is normally an inexorable Portent of Doom for anyone who sees it in the Fist Of The North Star universe, but Rei is willing to die so that Mamiya, who was under the star in question, can live on.
Series Continuity Error: When Kenshiro's adoptive brothers were first introduced, Kenshiro initially mentions that none of them are actually blood-related. Later it turns out that the eldest two, Raoh and Toki, are blood related after all and we are shown the ruins of their childhood home along with the graves of the birth parents. However, it later turns out that none of them were even born in Japan at all, but that the three of them were refuges from the Kingdom of Shura and that Raoh and Toki's mother is buried in a swamp. If that wasn't enough confusion, then comes the prequel, Fist of the Blue Sky, which shows that the baby Kenshiro was born in Japan... or not, as apparently where he was born was actually in China.
In the Hokuto no Ken 2 portion of the anime, the child version of Toki is drawn with white hair during the flashbacks when he was still in Shura. However, the first anime series already established the fact that Toki's natural hair color is brown and it didn't became white until he was exposed to nuclear fallout as an adult.
The whole darned franchise is one to the Australian cult classic Mad Max 2: The Road Warrior, although it's only prominent during the early chapters.
The act of cruelty that Diamond performs to a little girl and her father early on in the manga will be quite familiar to anyone who's seen Once Upon a Time in the West.
When Kenshiro heads off to Shura, with the shades/goggles on he ends up looking an incredible lot like Marion Cobretti...
Chapter 3 of Volume 27 is tragic as hell — but ends with an incredible shout-out to the opening of the manga staggering through the desert, begging for water — but this time, with Bat and Lin right there.
In episode #3 of the 1st animé series, the Diamonds mooks make some poor sod shoot down a tin can from the head of his own son. This is a clear Shout-Out to the story about the famous Swiss Folk HeroWilhelm Tell.
The Joker is a clear shout to the eponymous DC villain, as is Jakoh since his facial features are closely modeled after the same character.
Whenever a major villain manages to draw Kenshiro's blood, he has a tendency to taste it and spit it out, just as Bruce Lee did while fighting the Big Bad in Enter the Dragon.
We never see the technique in full in the original source, but Yuda's "Kesshou Shi" is shown in full in the Arc Sys fighting game, and it looks a lot like the Psycho Crusher.
Single Woman Seeks Good Man: Despite all the violent warlords wanting Yuria's affection, she forever loves Ken for his kind and tender nature.
Sliding Scale of Idealism Versus Cynicism: Unapologetically idealistic and morally righteous in spite of being set in a post-apocalyptic Crapsack World. The heart and soul of the series seems to be "It is easy to do good in times of prosperity, but it takes a true hero to be a good person when the entire world is screaming for you to be otherwise."
Spaghetti Western: Replace the gunplay with kung fu, and the grim violence punctuated with bursts of heroic idealism will fit right-in the world of Sergio Leone.
The Spartan Way: The Kingdom of Shura, where the law states one does not reach manhood until he has defeated a 100 men.
Stout Strength: Mr. Heart and, to a lesser extent (in that he's slimmer, not weaker), Fudoh.
Streamline Pictures: The English dub of the movie by Streamline Pictures removed most of the backstory regarding the history of Hokuto and Nanto and how their styles worked, had some of the names anglicized or mispronounced (in particular, Raoh pronounces Ryuken's name as "Rye-ah-ken" instead of the proper "Ree-ooh-ken"), and even changed the cause of death of Shin (in the Japanese version, Raoh easily defeats Shin while in the English version, Kenshiro apparently does (making as if he doesn't know his own strength), making it a half-assed anti-climactic Curb-Stomp Battle. On the plus side, it had James Avery (Uncle Phil/Shredder) as the voice of the Fang King.
Spam Attack: Most skilled martial artists have at least one. Hokuto Hyakuretsuken, Kenshiro's famous Hundred Crack Fist, is a classic example.
Spell My Name with an S: As with all popular Japanese manga franchises, the spellings of many character names tend to differ between sources and media. Notably, the name of the Holy Emperor tends to vary from "Souther", "Thouzer", "Thouther", and even "Thoutoher" (and it's notably pronounced "Souzer" even in the English dub of Hokuto Musou). Not to mention Yuria/Julia, Yuda/Juda, Lin/Rin, Shuu/Shuh/Shew, and Uighur/Uyghur.
Stock Shoutout: Hokuto Hyakuretsuken is one of the big ones in anime. Any Spam Attack accompanied by an "ATATATATATATA!" shout is giving a nod to Kenshiro.
Stay in the Kitchen: One of the franchise's hang-ups is that it is written to portray women in a particularly patronizing way, even women (such as Mamiya, or Reina from the movies) who are way more competent than the average male villager, mooks, and villain of the week. The sad thing is that the show clearly thought it was pro-woman in some episodes, but it was just incredibly paternalistic. A good example is the case of the Six Nanto Masters, the greatest practitioners of Nanto Seiken. There's only one female Master, and whilst the rest of them are godlike kung fu experts who can slice off your face with their feet, she's a spiritual leader with no combat abilities whatsoever.
Super-Deformed: There is a spinoff manga with a super deformed art style titled DD Hokuto no Ken. In this story, "...the characters of Fist of the North Star are living in peaceful Japan. In particular, Kenshirō is a convenience store worker, Raoh works at a factory, and wracked by illness, Toki is looking for work." A TV anime adaptation is planned.
Swiper, No Swiping!: This happens near the end of the movie. Raoh is about to kill Kenshiro, when Lin appears and begs him to spare Kenshiro's life. He does.
Tender Tears: Despite their appearance, men of the Fist of the North Star series are actually very warm-hearted and do this a lot, maybe even more than Manly Tears. Even Raoh does this to grieve for Toki and Yuria's suffering, and those are the only times he ever sheds tears.
Shin's four henchmen in the manga are named after playing cards (Spade, Diamond, Club, Heart), while the anime adds Joker to the mix.
The Golan commandos are named after military ranks (Colonel, Mad Sarge, Major).
Jackal and his underlings are all animal-themed (although only two of them, Fox and Hawk, are named in the manga).
The martial arts of the Nanto Seiken school follows an avian motif (Lone Eagle, Waterfowl, Crimson Crane, White Heron, and Phoenix).
There Can Be Only One: Once Kenshiro's brothers are introduced, it is revealed that the law of Hokuto Shinken states that only one student can inherit its teachings; the others are to be either disabled or euthanized. Ends up leading to the story's events — Jagi's berserk moment came when Kenshiro was chosen, and Raoh's refusal to let himself be crippled led to the fight where Ryuken died.
This Is Unforgivable: When Kenshiro growls this phrase at you, it goes without saying that you're pretty much screwed. Kenshiro goes one further after Shu's death: "Not one hair of you will remain in This World!!!"
Tiger Versus Dragon: Kenshiro and Raoh are sometimes represented by a dragon and a tiger, respectively. Kenshiro is stoic and does not seek power, Raoh is more hot-blooded and ambitious.
It also comes up when Kenshiro and Rei fight each other to save Airi and Mamiya, as Rei uses a technique called Nanto Tiger Destroying Dragon and Kenshiro uses Hokuto Dragon Attacking Tiger.
Time Skip: The second half of the manga begins several years after the first one, with Bat and Lin now grown up.
Token Motivational Nemesis: Shin in the manga, whose only reason of existence is to give Kenshiro his signature scars and take Yuria away from him before being killed by the end of the tenth chapter. The Adaptation Expansion of the TV series padded Shin's role for up to 22 episodes. Most of this only amounted to giving Shin more henchmen to order around than the four he had in the manga, but he does get his own moment of glory by thwarting a conspiracy to overthrow him just before his final battle with Kenshiro. The anime also depicts the dissolution of Shin's army and the destruction of Southern Cross before the final battle, which arguably gives a greater sense of resolution to the Shin than simply having his army vanish with no explanation after his death like in the manga.
Too Dumb to Live: A lot of glaring villain examples in the filler episodes, in particular a Bad Boss known as David who has just witnessed Kenshiro demolish his fifteen-feet tall henchman Glen (whom he brainwashed as a slave since childhood) with ONE hand. When Kenshiro took pity on Glen and gave him a second chance to be a good person, David just had to murder said-giant in cold-blood, then taunts Glen for being a weakling complete with Evil Laugh in front of the horrified-and-angry STILL PRESENT Kenshiro. What an Idiot. Fortunately averted by Souther's troops after his defeat, once Kenshiro's walked back down the pyramid stairs. There's obvious shame and regret over what they were fighting for, but in the first Raoh Den movie, the kids actually put themselves between the troops and Kenshiro. Had the troops in that one made a move, Kenshiro would have been right there.
To the Pain: Ken usually describes just what he did to an opponent before it finishes them off.
Touch of Death: Hokuto Shinken is basically an entire martial art based around this.
Training from Hell: Even in a series notable for its lack of gratuitous training scenes, there are a few glaring examples. At one point, Ken flashes back to when the adolescent students of his school had to fight the students in another school...where the fights were apparently to the death. Another time, there's the memory of the Hokuto Shinken final test, where Ken and Raoh have to face a tiger and are expected to make the tiger back down through sheer badassness — killing the tiger instead is considered a major screw-up. And Souther's final test for his phoenix-themed martial art
Tragic Hero: Raoh, for several reasons actually. (1)He wants to restore order and peace to the world by means of instilling fear and terror,(2) he wants Yuria to fall in love with him through similar methods, and (3) his ultimate goal is to become so powerful that even the heavens will bow down to him. His status as a tragic hero is especially prevalent in the spin-off series, Legends of the Dark King.
Shin also counts.
Trope Maker/Trope Codifier: Quite simply, FOTNS is THE granddaddy of most Shonen fighting series (along with Dragon Ball), and pretty much every trope that applies to them was codified by it (Again, with Dragon Ball). It's easier to mention which fighting series are NOT in any way influenced by it).
Updated Re-release: Series which are tremendously popular in Japan gets to be published again in various forms after its original publication, some are in form of less volumes with each having at least 350+ pages to eventually cover an entire arc in just one volume (Bunkoban), then there are the difinitive/ultimate collections, the Aizobans and Kanzenbans, they tend to have less volumes than the original publication but not as short as the Bunkobans, these ultimate collections aims for completion and quality, each volume has high quality white office paper and collects every single thing publicated in the original magazines and data books that don't find its way in normal publications, so color pages, extra information, magazine covers, drafts, sketches & etc, can be found in these ultimate editions. In 2006 Hokuto no Ken was graced with a Kanzenban publication, just 15 volumes as opposed to the original 27 volumes.
Unproblematic Prostitution: In Rei's side-story manga, the city of Azgarzul is a city of women ruled by women that makes most of its income from prostitution. But they have choice in whom they service, and there's rules about being reasonably polite and courteous to the working girls. It still comes off as incredibly sexist, since there's a heavy implication that prostitution is the only way for a woman to be empowered and independent.
Unstoppable Rage: Ken does this almost every episode, usually illustrated when his battle aura causes his shirt to disintegrate. This is even more amusing once you discover that it's actually a part of Hokuto Shinken - the move is called Tenryu Kokyu Ho, or "Art of the Dragon Breath", and enables the practitioner to tap into the 70% of the human body's power that is not normally used. There's actually an exception. When Rei first appears and says he's looking for the man with seven scars on his chest, the plot requires that Kenshiro not show his chest. Accordingly, Kenshiro's battle aura never does this until that plot is resolved.
Upto Eleven: Kenshiro's already a one-man killing machine but the movie instalments ramp up his power to ridiculous levels. In the 1986 movie, he topples a skyscraper with ONE PUNCH and proceeds to WALK THROUGH IT while it's collapsing, and in Kenshiro Den, he single-handedly destroys an entire army (and bear in mind this is a prequel). Averted by New Fist of the North Star, when Kenshiro is foiled by a metal grid and needs help from a supporting character to break free.
Visual Novel: In 1986, Enix created a spinoff visual novel / Adventure Game called Hokuto no Ken: Violence Gekiga Adventure. It was released for several computers that were popular in Japan at the time. It was basically a loose retelling of the Southern Cross with many of the same events transpiring differently.
There was another Visual Novel-style game released by Banpresto in 1995, simply titled Hokuto no Ken. It was released for the PlayStation and Sega Saturn and took place after the events of the manga. Lin gets kinapped (again) on the day of her wedding with Bat and another Hokuto school (Hokuto Mumyoken) is behind the events.
The War on Terror: In the intro to Jun'ai no Shō - which is the first part of the Shin Kyūseishu Densetsu film series - it is implied that this was the reason for the nuclear war.
Wasteland Elder: Kenshiro encounters quite a few elderly village leaders during the series.
We Hardly Knew Ye: "Hey, there's a new, cool looking character with a weird new fighting sty- Oh they're dead already." And that's for the good guys. Bad guys end up in the boneyard even quicker and bloodier.
The Western: Think David Carridine's Kung Fu directed by Sergio Leone on a very bad day and you get this classic Sci-Fi Kung-Fu Western.
What Measure Is a Mook?: Kenshiro kills mooks without remorse but will often try to spare their boss because of a freudian excuse.
When All You Have Is a Hammer: The solution is punching. No exceptions. Bandits holding the village hostage? Punch them. Facing down a tank? Punch it. Trying to cure a little girl of trauma-induced muteness? Punch her, dammit!
Whip It Good: Uighur. Uighur is a huge, huge man running a prison, so the theme of control and enslavement is still there but without any of the usual vampiness associated with whips. In fact, he's presented as a serious martial artist. (Well, as serious as you can be if you're not named Kenshiro, Toki, Raoh, Souther, or Rei anyway...)
A military-style minor villain from one of the earlier episodes also wields one capable of slicing people in half. For all the good it does him against Kenshiro.
Wide-Eyed Idealist: Kenshiro is an idealistic lives in a Crapsack World where people daily dies and kills over a scrap of food or a sip of water. Still he believes it is easy to be despicable in this age, but that it takes a true HERO keep your humanity and keep being a good person when everything and everyone around seems suggesting to you otherwise. In the first chapter, Bat asks him bluntly how he has survived so far if he would not even try break himself out of jail because it could get a little girl in trouble. Not long after, Bat finds out Kenshiro is idealistic because he can affordto be. Behaving like scum and harming helpless people in front of him is a very, very bad idea. Like in "he WILL disintegrate you" bad idea.
Wife-Basher Basher: Though Kenshiro and Rei will avenge the abuse of all innocents as a matter of course, they are exceptionally harsh towards any "man" who dares to strike or abuse women; and that's saying something considering how brutal and cruel Hokuto Shinken and Nanto Seiken already are. And if you serve in Raoh's armies, donotrape women if you don't want your head literally slapped off your shoulders, like the rapist-mook in the manga found out the hard way.
Wife Husbandry: Whilst it's completely accidental on his part, Kenshiro gets worryingly close to doing this with Rin, and it doesn't help that everyone else promptly turns into a Shipper on Deck. As a result, much of the second half of the manga involves him trying to get her to see other people - or, more specifically, Bat.
William Telling: Used as a Kick The Dog moment in an early episode, with one of Diamond's men forcing a villager to try to shoot a can off the head of his son with a bow and arrow. The scene it replaced in the manga was even crueler than that.
Raoh does some truly hideous things to build his empire, but considering the state the world is in it's easy to see why. Not to mention his goal to become the strongest man alive, as he was originally intended to be the successor to Hokuto Shinken before losing the position twice.
A World Half Full: Even if the world is burnt by nuclear fire, it will only stay bad if you chose to let it stay bad: If you have the power and are willing to care, even a wasteland can be made a better place.
Despite the nuclear war, there seem to be quite a few people still left, and later on in the manga the post-war civilization has developed to a point were a large number of independent states exist here and there.
World of Ham: There is no space for subtle emotions here; all feelings are either screamed out, punched out, or cried out in the worlds of Buronson and Hara.
You Can't Fight Fate: Made very explicit by having astrology play a part in most major fight scenes.
You Didn't Ask: Often, Ken will only save someone after being told for the 1,000th time about how evil the captor/tyrant is.
And just as often subverted. If anyone is doing anything evil or unlawful to innocents within earshot of Kenshiro, he will usually respond. If they're lucky, he'll just make their arms useless or otherwise neutralize them. If they did something really bad, such as hurting women or children, expect heads exploding.
Your Head A Splode: Watch out if you have a mohawk! Sometimes subverted in which even without a mohawk, doesn't mean you're safe. Look at Jakoh's death scene for one thing.
Your Princess Is in Another Castle: Kenshiro meets this trope after storming one of Raoh's castles in search of his kidnapped fiancée. It also happens during the anime version of the Southern Cross arc, except substitute Raoh for Shin.
Also happens when Rei raids Juda's hideout with the intent to kill him, only to find out that Juda left long ago.
Your Size May Vary: Attacking opponents suddenly much bigger? Kokuoh-Go, Raoh's unusually large horse, becoming large enough to completely stomp mooks under his hoofs when moments ago they were only as big as head? Raoh himself, usually only two heads taller than Kenshiro, suddenly becomes a giant at least as twice as tall? Mako begging for mercy from Jagi, whose knees are now at head level? This series has a lot of this.
Zeerust: The original manga was published during 1980s, at a time when most doomsday predictions placed the end of the world at the late 1990s. Thus, the nuclear war occurs in the year 199X and the term Seikimatsu ("end of the century") is used to refer to the era the story takes place. This becomes Zeerust Canon in all of the newer spin-offs published after 2000 and onward, which continued using the term Seikimatsu.