Ninja

For the motorcycles of the same name, see Kawasaki motorcycles. For the supermodel-singer Ninja, see Ninja Sarasalo.

Ninja (忍者) were said to be agents of espionage and assassination in feudal Japan in legend and popular fiction. Revered by some as the world's first special forces, some modern practitioners of budo ninjutsu argue that ninja were used primarily as spies, not assassins, and this appears to be borne out by some historical records. It is popularly believed that the ancient ninja were peasants, forbidden under law from studying the samurai swordplay techniques because of feudal Japan's caste structure, but more likely they originated from a variety of castes.

For references to ninja in popular Western culture, including film and comic appearances and the recent spate of websites devoted to neo-ninja and other ninja-centric parody, see Ninja in fiction, below.

NOTE: Due to the secretive nature of the Ninja, no official records were kept by them of their activities, culture, or training. Any or all of this information could be incorrect, influenced by manga, anime, movies, or other media. All information on them has been inferred by records kept by samurai and other non-secretive societies that occasionally did business with ninja. Summary: none of this can be assumed to be accurate.

Etymology

Ninja is Sino-Japanese compound derived from the two kanji (Japanese characters of Chinese origin) used to write shinobi-no-mono (忍の者), one of the native Japanese words for people who practice ninjutsu (sometimes erroneously spelled ninjitsu). Ninja and shinobi-no-mono, along with shinobi, another variant, became popular in the post-World War II phonetically with the kanji 志能備, has been traced as far back as Japan's Asuka period, when Prince Shotoku is alleged to have employed one of his retainers as a ninja.

The underlying connotation of shinobi (忍, pronounced nin in Sino-Japanese compounds) is "to do quietly" or "to do so as not to be perceived by others" and—by extension—"to forebear," hence its association with stealth and invisibility. Mono (者, likewise pronounced sha or ja) means "person." The nin of ninjutsu is the same as that in ninja, whereas jutsu (術) means skill or art, so ninjutsu means "the skill of going unperceived" or "the art of stealth"; hence, ninja and shinobi-no-mono (as well as shinobi) may be translated as "one skilled in the art of stealth." Similarly, the pre-war word ninjutsu-zukai means "one who uses the art of remaining unperceived."

History

Because ninja rarely left anything in writing or boasted of their achievements, the history of the ninja is mostly apocryphal and blatantly legendary, so the great majority of stories circulating about them are difficult to prove.

Historical examples of ninja are said to include Minamoto no Yoshitsune, who employed surprise as a major weapon in his victories. He is said in a popular folktale to have been educated by a tengu to learn tactics and became a ninja.

One of the earliest roots of ninja, Togakure Ryū, reportedly originated in the late Heian Period. Iga and Kōga are two of the most famous ninja styles, and are often pitted against each other in fiction. Some also say that they were allies and worked together in mutual defense pacts. Both of these claim that they originated in the Heian period.

Only a few records remain from the Kamakura period. Kusunoki Masashige used tactics against enemies that remotely resemble ninja tactics. From the Muromachi period there are even fewer records. Both of these times were generally peaceful, and many battles had tournament-like aspects that prevented surprise attacks. Somewhere in these time periods, bushido began to form as the proper and honorable way a samurai must follow. It would be well into the Edo period that bushido was finally formalized.

In the Sengoku Period, also known as the Warring States period, ninja supposedly flourished. Almost all famous daimyō are said by modern ninja schools to have had ninja, or a ninja-like group under his control and they served as eyes and ears. Some daimyō were reportedly ninja themselves. The clan of Sanada, the most famous member being Sanada Yukimura, was reportedly a ninja clan. This is attributed to the successful defense of their castle with approximately 3,000 soldiers against an overwhelming force of 50,000 led by Tokugawa Hidetada. Their tactics, which are said to have included splitting their house in two, one each supporting Toyotomi and Tokugawa in order to survive no matter which side finally won, has been the subject of much legendary discussion. Later, they would come to be called Sanada Jū Yushi, lit. Ten heroes under Sanada, in tales where they used ninja skills to defeat everything but their jealous wives (who were, of course, ninja themselves).

Tokugawa Ieyasu was claimed to have used ninja, controlling both Iga and Koga in unifying Japan and ultimately rising to the rank of Shogun. In his dramatic escape through the mountainous landscape of Nara after Oda's assassination, Iga ninja led by Hattori Hanzō allegedly helped Ieyasu escape, gaining his favor. The last battle where ninja reportedly fought is in the Siege of Shimabara under the Tokugawa shogunate. As the shogunate became stable, ninja were effectively unemployed. Some were said to have become Oniwabanshū, a semi-secret group of bodyguards and intelligence officers who worked tending gardens of the Edo castle and eavesdropping on the daimyō. A purported ninja master Fujibayashi Sabuji wrote Bansenshukai (万川集海) as a collection of ninja knowledge. Yet the stories go that most knowledge was still passed on through oral tradition and training, as most ninja believed that their services would soon be needed again. The peace of the Edo period continued for over 200 years.

In the Edo period, ninja became popular heroes in books and plays. Many mythical ninja powers such as becoming invisible, jumping over tall fences, casting spells and calling up a giant toad larger than a human were all invented in these fictitious accounts of ninja. Ninja did not correct these misconceptions and some may have even written these stories themselves to increase their value should their services be needed. One of the lesser known contributions made by ninja is their involvement in furthering the research of fireworks as a result of their development of pyrotechnic weaponry.

Few traces of Ninjutsu remain in Japan today, such as the Koka-ryu Ninjutsu Yashiki (Koka-ruy Nijutsu Palace) in Shiga, near Kyoto, which is mostly geared toward children, the Togakushi Chibikko Ninja-Mura (Kid's Togakushi Ninja-village), which is little more than an amusement park, and the The Iga-ryu Ninja Museum, which features the most comprehensive understanding of Ninjutsu.

Culture of Ninja

A ninja organization was said to be headed by a jōnin (上忍), literally "high ninja". Under jōnin would be several chūnin (中忍, "middle ninja"). Under chūnin would be several genin (下忍, "low ninja"). Upon receiving a mission from daimyō, the jōnin would use the chūnin to select necessary personnel from among the genin. Some ninja groups would be smaller and may have been less structured. Other groups may have been structured more like an army and the leader may instead have been called shō or "general".

While ninja are often depicted as male, and nearly all military and related professions were typically limited exclusively to males, females were supposedly ninja as well. A female ninja may be called kunoichi (くノ一); the characters are derived from the strokes that make up the kanji for woman (女). They were sometimes depicted as experienced prostitutes who learned the secrets of an enemy by seduction; though it's just as likely they were employed as household servants, putting them in a position to overhear potentially valuable information. In either case, there is no support for the popular image of female ninja assassins, and they were more likely employed as spies and couriers.

Ninpō (忍法) refers to various skills used by ninja, but mostly supernatural and fictional. Ninja are said to have actively encouraged such superstitions about their abilities to inspire fear in potential enemies.

Ninja were said to have had many rules, and the most important rule was of keeping the secret of ninja themselves and of the daimyo who gave them the order. Stories say that the most severe crime was leaving a ninja family without authorization, with no intention of returning. He would be called nukenin (抜け忍) and his family members would be tasked to bring him back, dead or alive.

Ninja suit

Contrary to popular belief, there is no evidence that the ninjas dressed in all black suits. The classic black ninja outfit (shinobi shokuzu) is said to have come from the Noh theater. Prop handlers would dress in black and move props around. The audience would obviously see the prop handlers but would pretend they were invisible. Another idea supporting the absence of a ninja outfit and any specific weaponry is that, if caught or seen, they would have been identified as enemies. This would only result in capture, torture, and probably a very slow and painful execution. Thus, these spies and assassins were far more likely to be disguised as samurai, priests, or peasants or when situation dictates, dark green, blue or dark red outfit which offers better camouflage to its surroundings.

Disguises were selected on the basis of their unobtrusiveness in a given environment. Some ninjas were said to have disguised themselves as Fuke monks and used the traditional flute of the zen sect, the Shakuhachi, as a powerful blunt weapon. Many government agents and ninja disguised themselves as komusō, since one could travel about in complete anonymity and gather information. There were even short pieces that were supposed to be played by one komusō greeting another. These suizen melodies tended to be very difficult to outsiders of the sect. If the second komusō did not respond, the first would know that the other was probably a spy. One known tool used by ninja is irogome (literally, "colored rice"). Irogome was uncooked rice seeds colored in five or six different colors: red, black, white, yellow, blue, and sometimes brown. They would be placed on the ground or handed to a ninja from a ninja. Each combination carried certain meanings like "all clear" or "an enemy check point is ahead".

Tools and weapons

Ninja are said to have made use of weapons that could be easily concealed or disguised as common tools, the bo, and handclaws (shuko, neko-te tekagi) probably being the most famous, except for the amazing shuriken (throwing stars), popularized by comic book mail order advertisements. Kunai (a gardening tool) were also a popular weapon as they could be hidden easily or carried if the ninja was disguised as a gardener. It was the equivalent of a utility knife, often used to pry or cut rather than fight. The makibishi, a type of caltrop made of iron spikes, is also famous. It could be thrown on the ground to injure a pursuer's feet or thrown out on an enemy's escape path so that the targets could be cut down or shot down with bows and arrows while they looked for another escape route, but it could also be covered with poison so the victim would die slowly.

In popular folklore, ninja also used special short swords called ninja-ken (or ninja-tō see below for explanation), or "shinobigatana" (Note the avoidance of the term 'ninja', but inclusion of the term shinobi, a synonym). Ninja-ken are smaller than katana but larger than wakizashi. The ninja-to was more of a utilitarian tool than a weapon. Another version of the ninja sword was the shikoro ken (saw sword). The shikoro ken was said to be used to gain entry into fortresses. The shikoro ken supposedly could also be used to cut (or saw) through opponents. The ever popular sai, or three-pronged dagger is also associated with ninjas.

Contrary to popular belief, there is no evidence that the nunchaku were used by the ninja, and there is no mention in any record of them using one. Though their records are filled with references to other weapons. Karate, judo, kendo, and most other martial arts were never practiced as well, as they were mostly formalized in late Edo period to Meiji period. Ninja practiced a variant of jujutsu and kenjutsu that could be summed up as ninjutsu.

Ninja also employed a variety of weapons and tricks using gunpowder. Smoke bombs and firecrackers were widely used to aid an escape or create a diversion for an attack. They used timed fuses to delay explosions. Ōzutsu (cannons) they constructed could be used to launch fiery sparks as well as projectiles at a target. Small "bombs" called metsubishi (not the company) were filled with sand and sometimes metal dust. This sand would be carried in bamboo segemnts or in hollowed eggs and thrown at someone, the shell would crack, and the assailant blinded. Even land mines were constructed that used a mechanical fuse or a lit, oil-soaked string. Secrets of making desirable mixes of gunpowder were strictly guarded in many ninja clans. Other forms of trickery were said to be used for escaping and combat. Ashiaro are wooden pads attached to the ninja's tabi (thick socks with a sparate "toe" for bigger toe; used with sandles). The ashiaro would be carved to look like an animal's paw, or a child's foot, allowing the ninja to leave tracks that most likely be tracked. Also a small ring worn on a ninja's finger called a shobo would be used for hand-to-hand combat. The shobo would have a small notch of wood used to hit assailant's pressure points for sharp pain to sometimes temporary paralyzation. (see pressure points). A suntetsu is very similar to a shobo. It could be a small oval shaped piece of wood affixed to the finger by a small strap. The suntetsu would be held against a finger (mostly middle) on the palm-side and when the hand was thrusted at an opponent, the longer piece of wood would be used to hit the pressure points.

Myths of Ninja

There are many myths and legends concerning ninja, who were most prevalent during Japan's feudal era and often served daimyo, or feudal lords, for secret missions. Their special abilities are also often exaggerated, such as becoming invisible, multiplying themselves, turning into animals, jumping over buildings, the ability to fly, stick to the walls and foresee the future. These myths were caused by the secretive nature of ninja, and confusion with Tengu and yamabushi. The myth of these abilities was much stronger when they were on operations and demonstrated them as if they were real powers such as the multiplication ability in which one ninja, if discovered, would make a special move and his fellow ninja mates would aid him and then disappear. The ninja often encouraged rumors to make people believe they had magical powers so they would become extraordinary figures. At least one ninja was recorded to have faked his own death so people would think he was a ghost and therefore immortal.

Ninja in fiction

Ninja appear in both Japanese and Western fiction. Depictions range from realistic to the fantastically exaggerated.

Ninja have long been a popular subject in tokusatsu, anime and manga, such as the manga/anime series Naruto. The series keeps historical truths, such as weaponry, but allows itself many artistic liberties. The Japanese novelist, Ryotaro Shiba wrote a novel and a collection of short stories, based on ninja, Fukuro no Shiro and Saigo no Igamono. Fukuro no Shiro was made into a hit movie, as was Shinobi no Mono.

Ninja-based films and books became a popular culture craze in Japan during the 1950s and early 1960s and as a result a TV series called The Samurai was created in 1962 to cash in on the fad. Although only seen in Japan and a few other countries, the series was notable for its screening in Australia in 1964-65, as it was the first Japanese TV show ever broadcast there. The Samurai rapidly became one of the most popular programs ever screened on Australian TV, gaining a large audience among pre-teen children; its success even led to star Ose Koichi and a troupe of performers touring there in a specially-produced show in 1966. The series introduced the ninja concept to Australian audiences and the ninja soon became a cult favourite, with children dressing up as ninjas and making their own toy ninja weapons, notably the shuriken or "throwing stars". Several American ninja movies starring Sho Kosugi were released in the 1980s as well. Kosugi is to be in the upcoming movie The Return of the Ninja, which is to be released in 2006. Sam Firstenberg's American Ninja, a low budget movie released in 1985, was undoubtely the most successful flick in the genre produced by an American company, Cannon. Former model Michael Dudikoff, who played the lead character Joe Armstrong, was dubbed as "the James Dean of the Ninja movies". The story depicts the adventures of an amnesiac soldier who discovers to have received ninja training when was a child. Eventually, he will use his "capacities" against a drug lord in the Philippines. The movie proved to be a smash hit, and spawned four sequels: American Ninja 2: The Confrontation; American Ninja 3: Blood Hunt where Dudikoff was replaced by David Bradley; American Ninja 4: The Annihilation which paired down Dudikoff and Bradley and, finally, the straight-to-video American Ninja 5, a spin-off aimed to children. Today, the first two American Ninja are regarded as cult classics.

Perhaps the first cinematic mixing of two martial arts 'worlds' occurs in the Hong Kong movie "Ninja in the Dragon's Den" in which a young Ninja flees to China - both to evade the revenge of the clan he's betrayed and to seek one of the men he believes responsible for his father's death - and encounters a young Kung fu fighter in combat.

Western popular culture generally depicts the ninja as supremely well-trained martial artists and assassins, clad in a head-to-toe black or dark blue suit, using many kinds of exotic equipment and skills to accomplish their missions. Western fascination with the ninja bloomed in the 1980s, especially in the United States. The idea of a Westerner being granted entry to the secret ranks of the ninja has long been a subject of particular fascination for Western writers. For example, The Ninja (1980) series of thriller books by Eric Van Lustbader features a half-Japanese, half-Caucasian character who received ninjutsu training in his youth. According to Lustbader's website, The Ninja is seriously being considered to be made into a movie.

When G.I. Joe, a traditional American series of military action figures, was relaunched in the 1980s, the collection included a few ninja characters such as Snake Eyes, a Vietnam war veteran who studied the ninja arts after the death of his family. The massive popularity of the ninja characters completely overtook the more conventional army characters, and creator Larry Hama was pressured by Hasbro to create more ninja for the series.

In video games

In fighting games, ninja are typically quick to strike but lacking in power or defense. One of the most successful games ever on the Commodore 64 computer was The Last Ninja. In the Nintendo Entertainment System and Xbox games titled Ninja Gaiden, the player takes the role of Ryu Hayabusa, a ninja whose clan has been savagely murdered. Mortal Kombat, one of the most popular fighting games ever created, included several ninja-like characters with supernatural powers which seem to have been exaggerated from ninjutsu-related techniques or literature.

The word ninja is also used colloquially in massively multiplayer online role-playing games (MMORPG) to describe a player who unfairly takes items from the corpses of dead enemies without allowing other players a chance to take the equipment. These "ninja looters" loot items swiftly and with minimal attention being drawn to themselves (hence the name) and are generally shunned by other characters for their nefarious deeds.

Ninja in popular culture

There have been many spoofs of the ninja, such as Surf Ninjas, Beverly Hills Ninja, Teenage Mutant Ninja Turtles, 3 Ninjas, and three popular websites: Real Ultimate Power (which includes a subsequent book),Ninja Burger (which was made into an RPG, card game and book), and Ask A Ninja, (which features weekly podcasts themed at asking ninja-based questions). There has also been an animutation entitled "Holy S***! Ninjas!!!!!!" that spoofed the ninja. Many of these ninja spoofs pit them against pirates and ask the question If a pirate and a ninja were to fight, who would win?

Examples of ninja in fiction and popular culture

Films

You Only Live Twice

The James Bond novel and movie both depicted ninja.

The Last Samurai

The film depicted a ninja attack on the samurai.

Comic Books and Cartoons

Batman

Frequent references to ninja and ninjutsu appear in the comic books and movies including Batman Begins (2005) in which Bruce Wayne receives ninja training.

Marvel Comics

The evil ninja organization The Hand is featured in several comic series, particularly X-Men and Daredevil.

Naruto

Jounin, Chunin, Genin and Academy

Mighty Morphin' Power Rangers

A popular children's show which adapted more than one of their seasons into a ninja-like theme, one of the more popular titles being Power Rangers: Ninja Storm.

Samurai Champloo

The episodes Bogus Booty and Baseball Blues both deal with characters who are ninja or former ninja.

Teenage Mutant Ninja Turtles

All four main characters and many of their friends and foes are ninjas, including the deadly Foot Clan. The shows and comics have a strong Japanese-influenced theme.

Websites

Ask A Ninja

A series of movies in which a ninja answers questions asked about ninjas.

Maximum Ninja

A Macromedia Flash cartoon series in which the main character is a ninja with supernatural powers.

Ninja Burger

Popular humor website (as well as RPG, Card Game and Book) which purports that ninja run a fast-food delivery service.

Real Ultimate Power

A popular humorous website created by Robert A. Hamburger (as "Robert Hamburger", a 13-year-old character) about ninjas, whom he constantly describes with superlatives such as "totally sweet".

The Adventures of Dr. McNinja

A webcomic about a doctor who is also a ninja.

White Ninja Comics

A webcomic that follows the character White Ninja in a series of compromising positions or strange situations.

Video Games

Captain Commando

One of the members of the Commandos Team was Ginzu, who was a ninja trained in the fictional art of Bushinryu ninjitsu.

Dead or Alive

From the creators of Ninja Gaiden, this famous 3-D fighting game has a couple of ninjas in the arena, including Ryu Hayabusa and Kasumi, the runaway ninja who is the main character of the series.

Final Fantasy

Ninja appeared in the first installment of the series as an upgrade from the Thief character class, adept at using an array of weapons and armor, as well as casting black magic. Shadow, Edge, and Yuffie Kisaragi are the only dedicated ninja characters in the series.

Ninja also appear as a job class in Final Fantasy Tactics, who have the exclusive abilities to wield two weapons simultaneously and throw items such as ninja stars, elemental balls, and other weapons.

Guild Wars Factions

The Assassin, a new profession is available in this expansion of the MMORPG, Guild Wars. The Assassin sports armor and weapons highly akin to that of ninjas.

Mega Man: Powered Up

One of Roll's costumes, not usable until January 2007, has been revealed to be a ninja. A sword is included.

Metal Gear Solid

A stealth-action video game in which a character named Gray Fox is fitted with an exoskeleton modeled after a ninja. This suit enhances all of his physical attributes, as well as gives him powerful weaponry.

Metal Gear Solid 2: Sons of Liberty

Olga Gurlukovich disguised herself with a robotic ninja suit which beared many similarities with Gray Fox's. She had the same abilities as Fox, and like him, wielded a High Frequency Blade. Also, in the later stages of the game, Solidus Snake's forces were decked out in bionic exoskeletons resembling ninja outfits which gave them abilities like Gray Fox and Olga. They were armed with P90 Submachine guns and High Frequency Blades. Known as "Tengu Commandos'.

Mortal Kombat

A series of fighting games which depicts many ninja characters. These include Scorpion, Sub-Zero, Reptile, Noob Saibot, Frost, Rain, Ermac, and Smoke.

N (Macromedia game)

A downloadable computer game where you are a ninja collecting gold and dodging murderous robots to get to the next level.

Ninja Gaiden

A video game where the player controls Ryu Hayabusa, a modern-day super Ninja.

The Ninja Warriors Again

A side-scrolling beat-em-up where the player controls one of three cybernetic ninjas

Samurai Shodown

An arcade fighting game series which features a number of ninja characters including Kazuki Kazama, Sogetsu Kazama, Hattori Hanzo, Galford Weller, and Galford's dog and companion Poppy.

Snowboard Kids

A secret character, Shinobin, is a snowboarding ninja who uses a sword-shaped snowboard. He is unlocked after winning a race on the Ninja Land course.

Shadow Man

First appearing in Mega Man 3, the ninja robot was designed in blue dressed as a stereotypical ninja. He also used a giant shuriken in battle. He was later redesigned for the Mega Man Battle Network series as Shadowman.exe, where he became purple and resembles a modernized Ninja.

Shadow Warrior

A video game wherein the main character, Lo Wang, is a Ninja.

Shinobi

A video game series that features the main character Joe Musashi from the Oboro clan. There are many games in the series, the three most known are: Shinobi 3: Return of the Ninja Master which features Joe Musashi, Shinobi (PS2) which features new characters Hotsuma and his brother Moritsune (Also including Joe Musashi as a secret playable character), and Nightshade (AKA Kunoichi) which is a direct sequel of Shinobi (PS2) that features a female ninja (or "Kunoichi") named Hibana (Also featuring Hotsuma and Joe Musashi as secret characters).

Splinter Cell

A stealth-action video game series for the PC and Xbox that featuring a spy whose missons require ninja-like skills. The main character, Sam Fisher, is referred to as being not unlike a ninja in Splinter Cell: Chaos Theory.

Tales of Phantasia

In the GBA and PSOne remakes of this 1994 Japan-only action RPG for SNES, the optional character, Suzu, is a ninja who uses kunai, shuriken, and a "ninja-tō."

Tales of Symphonia

A RPG video game which features a main character, Sheena Fujibayashi, who is a ninja. In addition, many of the townsfolk of Mizuho are ninja.

Tekken

A series of fighting video games on the PlayStation, PS2, and Arcade that feature the alien-ninja character, Yoshimitsu and more recently in Tekken 5 as well as Tekken 5 Dark Resurrection, Raven.

Tenchu

A series of stealth-action video games on the PlayStation, PS2, and Xbox that feature the ninja characters Rikimaru and Ayame, as well as Tesshu, who is later available after completing the Rikimaru and Ayame missions. The game's developer, Activision, used Sho Koshugi and his son, Kane Koshugi, as ninjutsuka references.

Wizardry

This game series includes ninja characters. The class has the abilities of a Thief as well as the ability to use Fighter and some Samurai weapons. They also have the ability to snap enemy necks and dodge physical attacks outright--abilities that were hampered by equipping any weapons or armor, respectively.

List of ninjutsu styles (ryū)

The following list of ninjutsu styles practiced by ninja, known as ryū, is sorted by current prefectures in which the styles originated and their teaching is or was historically centered. In this context, the ordering may not be totally accurate as some historical and current boundaries do not coincide. Note also that some styles may no longer be practiced.

• Aichi - Matsuba-ryū, Ichizen-ryū
• Aomori - Nakagawa-ryū
• Fukuoka - Kuroda-ryū
• Gifu - Mino-ryū
• Ibaraki - Matsuda-ryū
• Kagoshima - Satsuma-ninpō
• Kanagawa - Fuma-ninpō
• Kyōto - Hatano-ryū
• Mie - Hattori-ryū, Momochi-ryū, Togakure-ryū, Iga-ryū
• Nagano - Kōyō-ryū, Togakure-ryū, Aoki-ryū, Itō-ryū, Akutagawa-ryū
• Nagasaki - Nanban-ryū (see also the Nanban period)
• Nara - Kusunoki-ryū
• Niigata - Uesugi-ryū, Kaji-ryū
• Okayama - Bizen-ryū
• Shiga - Tarao-ryū, Rigyoku-ryū, Kōga-ryū
• Shimane - Fukushima-ryū
• Tochigi - Matsumoto-ryū
• Tokyo (Akihabara) - Akiba-ryū
• Toyama - Echizen-ryū
• Wakayama - Kishu-ryū, Negoro-ryū, Saika-ryū
• Yamagata - Haguro-ryū
• Yamanashi - Takeda-ryū, Ninkō-ryū

External links

• Anerican Shidoshi Kai - US Instructors of Hatsumi Sensei Bujinkan Style
• Ninja museum in Ueno-city, Mie Prefecture, Japan
• Shinobi Movie
• Rhode Island Ninjutsu Center
• Dr. Masaaki Hatsumi, Grandmaster - Active Ninjutsu Training Worldwide
• Stephen K. Hayes - popular teacher of ninjutsu and prolific author.
• Ninja Lessons
• The "Ask A Ninja" Video Podcast
• The homepage of a devoted ninja fan

References

Hatsumi, Masaaki (1981). Ninjutsu: History and Tradition. Unique Publications. ISBN 0865680272. {{cite book}}: Unknown parameter |month= ignored (help)

• • [http://www.nikawakai.co.uk