A ninja (; pronounced as /ja/) or shinobi (; pronounced as /ja/) was an infiltration agent, mercenary, or guerrilla warfare and later bodyguard expert in feudal Japan. They were often employed in siege, espionage missions, and military deception. They often appear in the historical record during the Sengoku period,[1] although antecedents may have existed as early as the 12th century.
During the Japan's warring state period, jizamurai clans of peasant-warriors in Iga Province and the adjacent Kōka District formed ikki – "revolts" or "leagues" – as a means of self-defense.
Following the Tokugawa shogunate in the 17th century, the ninja faded into obscurity. A number of shinobi manuals, often based on Chinese military philosophy, were written in the 17th and 18th centuries, most notably the Bansenshūkai (1676).[2]
Ninja is the on'yomi (Early Middle Chinese–influenced) the two kanji "忍者". In the native kun'yomi reading, it is pronounced shinobi, a shortened form of shinobi-no-mono (忍びの者).[3] The word shinobi appears in the written record as far back as the late 8th century in poems in the Man'yōshū.[4] [5] The underlying connotation of shinobi (忍) means "to steal away; to hide" and—by extension—"to forbear", hence its association with stealth and invisibility. Mono (者) means "a person". The word ninja was uncommon, and a variety of regional colloquialisms evolved to describe what would later be dubbed ninja. The first known English use of the word ninja was in 1964.[6] Kunoichi (くノ一) is, originally, an argot which means "woman";[7] it supposedly comes from the characters くノ一 (respectively hiragana ku, katakana no and kanji ichi), which make up the form of kanji for "woman" (女). In fiction written in the modern era kunoichi means "female ninja".
By the time of the Meiji Restoration in 1868, shinobi had become a topic of popular culture in Japan which featured in many legend and folklore, where they were associated with many supernatural abilitiles.
It was believed the espionage activities of Ninja were attributed to Chinese military strategy, such as The Art of War by Sun Tzu. According to traditional evaluation, The ninja were stealth soldiers and mercenaries hired mostly by daimyōs.
Despite many popular folktales, historical accounts of the ninja are scarce. Historian Stephen Turnbull asserts that the ninja were mostly recruited from the lower class, and therefore little literary interest was taken in them. The social origin of the ninja is seen as the reason they agree to operate in secret, trading their service for money without honor and glory.[8] The scarcity of historical accounts is also demonstrated in war epics such as The Tale of Hōgen (Hōgen Monogatari) and The Tale of the Heike (Heike Monogatari), which focus mainly on the aristocratic samurai, whose deeds were apparently more appealing to the audience. Historian Kiyoshi Watatani states that the ninja were trained to be particularly secretive about their actions and existence:
However, some ninjutsu books described specifically what tactics ninja should use to fight, and the scenarios in which a ninja might find themselves can be deduced from those tactics. For example, in the manuscript of volume 2 of Kanrin Seiyō (間林清陽) which is the original book of Bansenshūkai (万川集海), there are 48 points of ninja's fighting techniques, such as how to make makibishi from bamboo, how to make footwear that makes no sound, fighting techniques when surrounded by many enemies, precautions when using swords at night, how to listen to small sounds, kuji-kiri that prevents guard dogs from barking, and so on.[9] [10]
Later in history, the Kōga ninja would become regarded as agents of the Tokugawa bakufu, at a time when the Shogunate used the ninja in an intelligence network to monitor regional daimyōs as well as the Imperial court. During this time, there are some definitive terms to classify their activities such as spying (kanchō), scout (teisatsu), ambush (kishu), and Agitprop (konran). The ninja clans organized into larger confederation, with their own respective territories. A system of rank existed. A jōnin rank ("upper person"). Followd by the chūnin rank ("middle person"), which task was personal assistant to the jōnin. genin rank ("lower person"), field agents drawn from the lower class for field operations. Ninja trainees also studied survival, poisons and explosives. Physical training involved long-distance runs, climbing, stealth methods of walking Training to disguise themselves also taught. Some evidence of medical training can be derived from one account, where an Iga ninja provided medical to Ii Naomasa, general of Tokugawa who was injured by gunfire the Sekigahara battle.
The skill sets of ninja agents known in modern times as, which comprised a variety of espionage and survival skills with each its own unique characteristic for each ninjitsu schools. Some view ninjutsu as evidence that ninja were not simple mercenaries because texts contained not only information on combat training, but also information about daily needs, which even included mining techniques.[11] The guidance provided for daily work also included elements that enable the ninja to understand the martial qualities of even the most menial task. These factors show how the ninjutsu established among the ninja class the fundamental principle of adaptation.
Ninja usually worked in team to scale a wall by providing a human platform to assist their team members in reaching the top of the wall. The Mikawa Go Fudoki gives an account where a coordinated team of infiltratiors usually using passwords to communicate to recognize their team members during the disguising operations as they dressed in the same clothes as the enemy.
In his Buke Myōmokushō, military historian Hanawa Hokinoichi writes of the ninja that they travelling in disguise into foreign territories to scout and enemy forces and setting enemy castle on fire attack, carrying assassinations, and Infiltration tactics. Espionage was the chief role of the ninja. With the aid of disguises, the ninja gathered information on enemy terrain and building specifications, as well as obtaining passwords and communiques. The aforementioned supplement to the Nochi Kagami briefly describes the ninja's role in espionage, as Stephen Turnbull stated that the Iga and Kōka ninja usually infiltrated enemy castles. Turnbull further added that Ninja gained notability as hired mercenaries during the 15th century to use many asymetrical warfare tactics such as scouting operations, raiding operations, arson, and even terrorism. These tactice were considered abhorrent by members of the samurai class. During the Sengoku period, demands for such unconventional operations increased. Meanwhile, Turnbull also stated there is no evidence to prove that Ninja were actively employed as professional assassins as it could be argued that they were just hired bandits. Modern historian Tatsuo Fujita opined that, based on the historical texts in 16 century by Naito Munekatsu, vassal of the Miyoshi clan, ninja warriors were actually feared as mercenaries who were proficient in the castle siege warfares.[12] Buildings were constructed with traps and trip wires attached to alarm bells to prevent enemy ninja infiltrations. In battle, the ninja were also used to cause confusion amongst the enemy. A degree of psychological warfare in the capturing of enemy banners can be seen illustrated in the Ōu Eikei Gunki, where a ninja once stole the banner of samurai lord Naoe Kanetsugu and hoisted it to next day to demoralize Kanetsugu's army in the war.
Most ninjutsu techniques recorded in scrolls and manuals revolve around ways to avoid detection, and methods of escape. These techniques were loosely grouped under corresponding natural elements. Some examples are:
The use of disguises is common and well documented. Disguises came in the form of priests, entertainers, fortune tellers, merchants, rōnin, and monks. The Buke Myōmokushō states that their missions were to disguise themselves as firewood gatherers and gaining information about the enemy. A mountain ascetic (yamabushi) attire facilitated travel, as they were common and could travel freely between political boundaries. The loose robes of Buddhist priests also allowed concealed weapons, such as the tantō. Minstrel or sarugaku outfits could have allowed the ninja to spy in enemy buildings without rousing suspicion. Disguises as a komusō, a mendicant monk known for playing the shakuhachi, were also effective, as the large "basket" hats traditionally worn by them concealed the head completely.
Ninja were believed to use used a large variety of tools and weaponries, which described and illustrated in the 17 century record Bansenshūkai, including climbing equipment, extending spears, rocket-propelled arrows, and small collapsible boats. Although it was believed the ninja wearing black garb (shinobi shōzoku) during their work, as depicted in modern media, there is no evidence for such attire. instead, ninja usually operated in disguise of civilians.[13]
The accounts about Ninja's armor existence cannot be verified. Depictions of famous persons later deemed ninja often show them in Japanese armour. with concealable types of armour made with Kusari (Japanese mail armour) and Karuta (armour) that could have been worn by ninja including katabira (jackets) made with armour hidden between layers of cloth. Shin and arm guards, along with metal-reinforced hoods are also speculated to make up the ninja's armor.
Tools used for infiltration and espionage are some of the most abundant artifacts related to the ninja. Ropes and grappling hooks were common, and were tied to the belt. A collapsible ladder is illustrated in the Bansenshukai, featuring spikes at both ends to anchor the ladder. Spiked or hooked climbing gear worn on the hands and feet also doubled as weapons. Other implements include chisels, hammers, drills, picks, and so forth.
Ninja also using mizugumo to walk on the water. This pair of footwear distributing the wearer's weight over the shoes' wide bottom surface, allowing the wearer to walk on the surface of water. The name of this equipment mizugumo was derived from the native name for the Japanese water spider (Argyroneta aquatica japonica). A similar footwear ukidari, also existed in the form of a flat round bucket, although arguably more unstable to use.
Goshiki-mai (go, five; shiki, color; mai, rice) colored (red, blue, yellow, black, purple)[14] rice grains were used in a code system,[15] [16] and to make trails that could be followed later.[17] [18] [19]
Ninja often used the katana as weapon of choice, which carried on the back. The scabbard of katana sword of Ninja could be extended out of the sword, and used as a long probing device. The sword could also be used to scale the wall, usingtsuba. there's no known historical information about the straight ninjatō pre-20th century. The first photograph of a ninjatō appeared in a booklet by Heishichirō Okuse in 1956.[20] [21] Ninja also using darts, spikes, knives, and shuriken as weapons, The chain and sickle (kusarigama) was also used by the ninja. Variant explosives such as Soft-cased grenaed designed to release smoke or poison gas, along with iron or ceramic shrapnel explosives also reportedly used by them.
See also: Ninjutsu.
The term of ninja was attributed retrospectively to 2nd-century prince of Japan Yamato Takeru. In the Kojiki, Takeru disguised as woman and assassinated two leaders of the Kumaso group.[22] Although its unlikely related to the commonly known ninja of later era. Earliest recorded ninja activities were traced during the reign of Prince Shōtoku in the 6th century. An adolescent espionage agent Hasetsukabe no Koharumaru was executed for spying against the insurgent Taira no Masakado. Later, 14th century chronicle Taiheiki recorded many ninja activites
In 1541, the Tamon-in Nikki (16th century)—a diary written by abbot Eishun of Kōfuku-ji temple—describes a sabotaging operation An Iga ninja squad entered Kasagi castle in secret and set fire to a few of the priests' quarters. They also set fire to outbuildings in various places inside the San-no-maru. They captured the ichi-no-maru (inner bailey) and the ni-no-maru (second bailey).
In 1558, Rokkaku Yoshikata employed a ninja squad of 48 ninja to burn Sawayama Castle, which led by a chūnin (ninja term for squad's captain). To conduct their operation, the ninja squad also stole a lantern which drawing of family crest (mon) belongs to the enemy clan, and recreate replica lanterns with the similar crest. By wielding these lanterns, they were allowed to enter the castle by the guards. As they entered the castle, they immediately set fire to the castle.
In 1561, Kizawa Nagamasa generals hired 3 Iga ninja during the capture of a castle in Maibara, which was owned by Rokkaku Yoshitaka, who was also the employer of Iga Ninja previously. However, those ninja agents refused take orders and threatened to desert the operation if they were not allowed to conduct the operation on their own way. As the fire was eventually set, allowing Nagamasa's army to capture the castle.
See main article: articles, Iga ikki, Kōka ikki and Iga–Kōka alliance. The Iga and Kōga ninja were actually jizamurai clans inhabited Iga Province (modern Mie Prefecture) and the nearby region of Kōka District, Shiga named after a village in modern day Shiga Prefecture. The remote location of Iga may contributed ninja's secretive development. The chronicle Go Kagami Furoku stated the origin of those ninja clans were traced into the family of Kawai Aki-no-kami of Iga. This also confirmed by the supplementary record to the Nochi Kagami, a historical record of the Ashikaga shogunate.
The clans of Iga and Kōla, became professionals which specifically trained for the asymetrical warfare tactics of the ninja. These ninja mercenary often hired by daimyōs between 1485 and 1581. Specifically, the Iga professionals were sought after for their skill at siege warfare, or "shirotori", which included night attacks and ambush.[23] By the 1460s, the leading families in the regions had established de facto independence from their shugo.
In 1560, after Battle of Okehazama, Tokugawa dispatched a group of 80 Kōka ninja under the command of Tomo Sukesada, which was tasked to raid an outpost of the Imagawa clan. This assault is recorded in the Mikawa Go Fudoki chronicle, where those Kōka set fire to its towers, and killed the castellan along with 200 defenders of the garrison.
In 1571, a Kōka ninja Sugitani Zenjubō attempted to assassinate Nobunaga with two Tanegashima (gun) rifles. However, his attempts was failed as his shots failed to penetrate the armor of Nobunaga. Sugitani was captured 4 years later and tortured to death.
In 1573, Manabe Rokurō, a vassal of daimyō Hatano Hideharu, attempted to assassinate Nobunaga by infiltrating Azuchi Castle. Although the mission failed and Rokurō forced to commit suicide. According to a document, the Iranki, when Nobunaga was inspecting Iga province after Tenshō Iga War, 3 ninja attempted to assassinate him with rifles, but was failed and instead just killing 7 of Nobunaga's attendants. The Kōka ikki persisted until 1574, when it was forced to become a vassal of Oda Nobunaga. The Iga ikki continued until 1581, when Nobunaga attack the Iga Province and destroyed those clans which rebelled against him. The Iga clans survivors flee to the Kii Mountains, but others escapes to enter the service under Tokugawa Ieyasu. Prior to the conquest of Kōka in 1574, the two confederacies worked in alliance together from at least 1487. After the suppression of the Iga province by Nobunaga, some of them escaped from the province and saught refuge with the Tokugawa clan. One of the most prominent members was Fujibayashi Yasumasa, son of the Fujibayashi Yasutoyo from the Fujibayashi clan.
After the assassination of Oda Nobunaga, Iga and Kōka ninja, according to tradition, helped Ieyasu undergo an arduous journey to escape the enemies of Nobunaga in Sakai and return to Mikawa. However, their journey was very dangerous due to the existence of "Ochimusha-gari" groups across the route. During this journey, Tokugawa generals such as Ii Naomasa, Sakai Tadatsugu and Honda Tadakatsu fought their way through raids and harassment from Ochimusha-gari (Samurai hunter) gangs to secure the way for Ieyasu, while sometimes also bribed given to some of the more amenable Ochimusha-gari gangs.[24] As they reached Kada, an area between Kameyama town and Iga,[25]
The local Koka-Ikki ninjas and Iga-Ikki ninjas under Hanzo who helped Ieyasu to travel into safety were consisted 300 Ninjas.[26] Furthermore, Uejima Hidetomo, a researcher of Iga Ninja history, has stated there is research which revealed that Hattori Yasuji, one of the ninjas who accompanied Ieyasu on his journey in Iga province, also served as a bodyguard and espionage officer under Muromachi Shogun Ashikaga Yoshiaki.[27] The attacks from Ochimusha-gari finally ended as they reached the former territory of the Kōka ikki, who were friendly to the Tokugawa clan. The Koka ninja assisted the Tokugawa escort group in eliminating the threats of Ochimusha-gari outlaws then escorting them until they reached Iga Province, where they were further protected by another group from Iga-ikki which accompanied the Ieyasu group until they safely reached Mikawa. The Ietada nikki journal records that the escort group of Ieyasu has suffered roughly 200 casualties during their journey from Osaka.[28] [29]
However, modern scholar such as Tatsuo Fujita doubted the credibility of Hattori Hattori Hanzō's ninja army theory, since it was first appeared in Iga-sha yuishogaki record which circulated in Edo period during the rule of Shogun Tokugawa Yoshimune. During his rule, Yoshimune were known for establishing the Oniwaban secret police institution which members hailed from the confederation warriors of Koka and Iga areas.[30] [31] [32] It has been argued that the circulation of the myth about Hattori Hanzō ninja army helping Ieyasu were created as propaganda to increase the prestige of Iga and Koka clan confederations in Tokugawa Shogunate.
In an undisclosed time, a ninja named Hachisuka Tenzō was sent by Nobunaga to assassinate daimyō Takeda Shingen, although it ended in failure. There is a record that there is an assassination attempt were on Toyotomi Hideyoshi, although it was thwarted. A ninja named Kirigakure Saizō (possibly Kirigakure Shikaemon) attempted to assassinate Hideyoshi with a spear, but was unsuccessful, as his attempt was foiled by a ninja worked under the command of Hideyoshi who smoked his place. However, the reliability of this story was considered fictional publications as it was the same publisher which depicted Saizō as one of the legendary Sanada Ten Braves.
In 1600, during the Sekigahara Campaign after the Eastern Army's victory at Sekigahara, the Iga acted as guards for the inner compounds of Edo Castle, while the Kōka acted as a police force and assisted in guarding the outer gate. It was said that at one occasion, a group of Mogami clan's ninja infiltrated the camp of Naoe Kanetsugu, stealing his battle standart, which later hoisted on the Hasedō Castle's gate, demoralized the Uesugi troops greatly in effect.
In 1603, a group of ninja from Iga clan led by Miura Yo'emon were assigned under the command of Red Demon brigades of Ii Naomasa, the daimyo of Hikone under Tokugawa shogunate.
In 1608, a daimyo named Tōdō Takatora was assigned by Ieyasu to control of Tsu, a newly established domain which covered portions of Iga and Ise Province. The domain at first worth of to the 220,000, then grow further in productivity to the total revenue of 320,000 koku under Takatora governance.[33] [34] It was reported that Tōdō Takatora employs the Iga-ryū Ninjas.[35] Aside from Ninjas, he also employs local clans of Iga province as "Musokunin", which is a class of part time Samurai who has been allowed to retain their clan name but does not own any land or Han. The Musokunin also worked as farmer during peace, while they are obliged to take arms in the time of war.
In 1614, The Iga province warriors saw action during the siege of Osaka. Takatora brought the Musokunin auxiliaries from Iga province to besiege the Osaka castle during the winter phase. Meanwhile the ninja units of Iga province were deployed under several commanders such as Hattori Hanzō, and Yamaoka Kagetsuge, and Ii Naotora, heir of Naomasa who also given control of Ii clan's Red Demons ninja squad after Naomasa died. Later in 1615, during the summer phase of Osaka siege, The Ii clan Red Demons ninjas led by Miura Yo'emon, Shimotani Sanzo, Okuda Kasa'emon, and Saga Kita'emon saw action once again during the Battle of Tennōji, as they were reportedly fought together with the Tokugawa regular army storming on the south gate of Osaka castle. In 1614, the initial "winter campaign" at the Siege of Osaka saw the ninja in use once again. Miura Yoemon, a ninja in Tokugawa's service, recruited agents from Iga province, and sent 10 of his members into Osaka Castle in an effort to spread rumors and misinformation to weaken the enemy forces internally. Later On the Osaka battles, these hired ninja fought alongside regular troops at the Battle of Tennōji.
A final but detailed record of ninja employed in open warfare occurred during the Shimabara Rebellion (1637–1638). The Kōga ninja were recruited by shōgun Tokugawa Iemitsu against Christian rebels led by Amakusa Shirō, who made a final stand at Hara Castle, in Hizen Province. A diary kept by a member of the Matsudaira clan, the Amakusa Gunki, relates: "Men from Kōga in Ōmi Province who concealed their appearance would steal up to the castle every night and go inside as they pleased."
The Ukai diary, written by a descendant of Ukai Kanemon, has several entries describing the reconnaissance actions taken by the Kōga.