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The ninjas of Japan during the 15th and 16th centuries are historically the most iconic. Yet, how much do we truly understand about them? In numerous ways, they excelled at concealing their lives and abilities. The practice of ninjutsu—stealth, combat, and infiltration—was meticulously preserved and handed down through generations.
In modern times, the concept of the ninja has become so heavily romanticized that the sole certainty is that only fragments of our knowledge about them are accurate. The enigma surrounding ninjas remains unresolved, and numerous factors ensure it will stay that way indefinitely.
10. Misconceptions About Ninjas Existed Even Back Then
During the 15th and 16th centuries, ninjas were extensively utilized. A prevalent myth suggests that ninjas were adversaries of samurai. However, ninjas and samurai frequently fought alongside each other in battles. Ninjas were ubiquitous, employed by any lord of significance.
As their role in national affairs expanded, so did the myths surrounding them. Tales claimed they could disappear into thin air, move as quietly as spirits, and even read minds. While some of these stories held truth, many were pure fabrication.
Outside of their own circles, ninjas were never truly understood. In fact, they were even more shrouded in myth and superstition than they are today. Many believed they wielded supernatural powers, akin to modern-day superheroes.
Despite their significant presence, the falsehoods about ninjas in the 16th century were remarkably effective. The extent of information lost due to the fear and awe they inspired in others is challenging to quantify.
9. Ninjas Actively Fueled the Myths Surrounding Them
Ninjas made little effort to dispel the rumors that elevated them to an almost mythical stature. Instead, they actively promoted these stories. The legendary status of ninjas didn’t originate in the 20th century but was already flourishing during their peak.
They leveraged these tales as tools for intimidation and deception. Their fearsome reputation deterred adversaries and potential invaders, painting them as larger-than-life figures. Exaggerated rumors served to obscure their actual methods and techniques.
Written records also failed to provide clarity about ninjas. Writers often exaggerated ninja abilities in biographies to make their narratives more engaging. Stories of ninja feats were frequently dramatized and presented as historical truths, making it challenging to separate fact from fiction even today.
8. They Were Trained in Seclusion
This highlights the secluded region of Iga. While ninja numbers and locations were difficult to track, it was widely accepted that the majority of Japanese ninjas originated from Iga. The area was nearly impregnable, offering an ideal defensive stronghold.
Surrounded by mountains and accessible only through narrow paths, Iga could be defended by a small force. This isolation allowed ninjas to live in obscurity before venturing into the wider world. Although the exact timeline is unclear, Iga likely became the heart of ninjutsu centuries before the decline of the ninja.
Their downfall occurred only through overwhelming military might. Oda Nobunaga’s son, Oda Nobukatsu, governed Ise province but was determined to annex Iga. He entered the region and began constructing a castle to serve as a strategic base for his campaign.
The ninja destroyed the castle before its completion. Humiliated, Nobukatsu launched an invasion with an army of 8,000 soldiers. The ninja exploited the terrain to ambush his forces, inflicting heavy casualties while suffering minimal losses. Nobukatsu was compelled to retreat, facing his father’s anger for his failed expedition.
When two Iga ninjas provided Oda Nobunaga with critical intelligence, he mobilized a force exceeding 40,000 troops and launched a full-scale invasion of Iga. Dividing his army into six units, he attacked through six passageways simultaneously, overwhelming the Iga ninja with sheer force. Their era of isolation ended, but their teachings endured.
7. The Art of Ninjutsu Was Poorly Documented
Ninjutsu knowledge was traditionally transmitted through oral teachings and demonstrations rather than written records. Only during periods of peace did some veteran ninjas document their techniques. Many others chose to keep their methods entirely secret.
Today, several families assert they are descendants of ninjas who learned through hands-on instruction rather than written texts. While no concrete evidence supports these claims, it is true that written materials played little to no role in the training of future ninjas.
While samurai adhered to a rigid code, ninjas embraced a philosophy of totality. This worldview emphasized the balance of the universe, where individuals played a part in maintaining harmony. Understanding opposites—good and evil, warmth and cold—was fundamental to the ninja way of life.
This broader moral framework allowed ninjas to learn formally from their masters while also focusing on skills they found most practical. They were free to adopt any useful technique, regardless of Bushido (“the way of the warrior”). This adaptability evolved across generations, making it challenging to trace the exact lineage of their practices.
6. Numerous Variations of Ninjutsu Existed
Different ninjutsu schools taught varying techniques, each focusing on distinct aspects of the ninja’s craft. One tale recounts a governor named Bakkansai Jotei, who attempted to capture a rebel entrenched in Sawayama Castle.
After the mountainous landscape hindered his attacks, Jotei enlisted a ninja named Dojun to devise a strategy. Dojun assembled a team of 48 men, infiltrated the castle, and set it ablaze.
As the fire raged and chaos ensued inside, Jotei launched an external assault, leading to the castle’s fall. The 48 ninja later established 48 distinct schools of ninjutsu, most of which were based in Iga.
Iga was home to numerous ninjutsu schools, each specializing in different aspects such as combat or stealth. This diversity has made it challenging for even the most dedicated biographers to provide a definitive account of ninja practices.
Biographers often reflect their own ideals and expertise, projecting them onto other schools. Historians, on the other hand, strive to uncover the universal principles of ninja philosophy rather than focusing on the beliefs of individual groups.
5. They Maintained Secrecy Even Among Themselves
Ninjas guarded their teachings not only from outsiders but also from other schools. This secrecy was not seen as disrespectful but rather as an integral part of their lifestyle, rooted in deception, espionage, and infiltration.
Their hierarchical system reinforced anonymity. Ninja households were divided into three ranks: Genin, Chunin, and Jonin. Jonin, the masters, issued orders to the others. Chunin acted as intermediaries, executing the Jonin’s commands while safeguarding their identities. Even Genin were kept in the dark about their superiors.
Genin were the foot soldiers, tasked with carrying out missions. While this is a simplified explanation, the ranking system effectively ensured secrecy, even among members of the same ninja group.
4. They Preserved Their Knowledge Within Families
To prevent enemies from infiltrating their schools, many ninjas chose to pass down their skills exclusively within their families. Only relatives were deemed worthy of learning these techniques, ensuring that children were born into the ninja tradition.
Training began at a young age, similar to the early education of samurai. Children practiced flips, kicks, and stealthy movements, often under the guise of play. If a child showed potential, they would advance to formal ninja training. By keeping the teachings within the family, both secrecy and loyalty were guaranteed.
3. We Prefer the Fictionalized Ninja
This is the primary reason ninjas remain shrouded in mystery. Do people genuinely wish to uncover the truth about ninjas? While countless accurate accounts exist, they are often contradictory due to widespread misconceptions, even within nonfiction sources.
The general public is far more captivated by the mythical portrayal of ninjas they’ve come to know. These are the ninjas Bruce Lee famously fought, or the ones depicted in Teenage Mutant Ninja Turtles.
Countless fictional depictions of ninjas exist, and the reality is that audiences prefer watching ninja-themed movies over historically accurate documentaries. We’ve embraced these fabrications, but would the ninjas of old disapprove?
They might view it as a greater loss if their enigmatic legacy were ever fully decoded.
2. Contemporary Accounts Are Unreliable
The early 20th century saw a resurgence of interest in ninjas, which later spread to Western culture. Writers produced historical narratives about ninjas, but many were enthusiasts or amateurs prone to exaggeration. As a result, numerous unreliable accounts of ninja history and abilities persist.
The ninja craze of the 1950s and ’60s further muddled the truth. While some myths about ninjas are clearly implausible, others have misled even seasoned authors.
In recent years, renewed efforts have been made to distinguish fact from fiction. This resurgence is partly due to the translation of original Japanese ninja texts into English.
However, discrepancies remain between old and new accounts. Some claim ninjas adhered to a strict moral code, while others argue they had none. Stories range from the use of throwing stars (which ninjas didn’t employ) to claims they avoided explosives (which they actually used). This inconsistency ensures the mystery of ninja lore will endure.
1. Ninjas Didn’t Fit the Popular Image
Ninjas are often depicted as black-clad warriors wearing masks. However, no historical records confirm the use of masks, and the black attire, which seems striking today, was common clothing during that period.
Many assumed ninjas had a standardized uniform, similar to samurai. Yet, such attire was reserved for warriors. Ninjas primarily wore everyday civilian clothes to avoid detection.
To blend into society, ninjas disguised themselves as samurai, ronin, or hermits. Mastering various skills beyond ninjutsu was essential for convincingly adopting these roles. Understanding cultural nuances, hairstyles, and mannerisms was a critical aspect of their infiltration strategies.
Tokugawa Ieyasu utilized ninjas as personal guards, instructing them to pose as gardeners rather than wearing traditional ninja attire. This allowed them to stay close while moving freely across palace grounds.
Their ability to blend in was key to their secrecy. Ninjas could assume the identity of nobility or peasants alike. The sickle and chain weapon, for instance, was partly inspired by their skill in transforming farming tools into arms.
They broke conventions by training women as warriors (kunoichi) and employing unlikely agents like the young, weak, or seemingly unintelligent. Such unconventional tactics were alien to samurai, enabling ninjas to operate undetected during that era.
