When you hear the phrase 10 amazing legends, images of shadowy figures slipping through moonlit corridors probably spring to mind. Yet those legends weren’t just fantasy; they were flesh‑and‑blood operatives who lived, fought, and sometimes died in the chaotic Sengoku era of Japan. Because ninjas operated from the shadows, official records are scarce, and myth often swirls around fact. Below we explore ten historically documented shinobi—some whose very existence is still debated, but whose deeds have left an indelible mark on the lore of espionage.
10 Amazing Legends Revealed
10 Kido Yazaemon
Kido Yazaemon, born circa 1539 in the rugged Iga province, earned his reputation as a master of the Tanegashima arquebus—a match‑lock rifle that was far from the stereotypical ninja weapon. His proficiency with the gun suggests he specialized in teppo‑jutsu, a fire‑based technique nested within the broader katon‑nojutsu discipline. Contrary to the popular image of ninjas shunning firearms, the arquebus was a favorite tool for covert assassinations, and Yazaemon’s expertise made him a feared operative on the battlefield.
The most striking episode in Yazaemon’s career unfolded in 1579 when he joined a three‑man team tasked with eliminating the powerful warlord Oda Nobunaga. The trio positioned themselves to fire at Nobunaga as he surveyed the aftermath of an invasion, but their shots missed the lord and instead claimed the lives of seven of his attendants. Though the plot failed, the incident was recorded in the historic Iga chronicle Iranki, cementing Yazaemon’s place among the boldest—and most unlucky—ninjas of his time.
9 Kirigakure Saizo
Kirigakure Saizo is best remembered today as the muse for the fictional second‑in‑command of the Sanada Ten Braves, yet his historical counterpart was an Iga operative whose daring attempt on Toyotomi Hideyoshi’s life turned into a twist of fate. Operating under the alias of Kirigakure Shikaemon, Saizo tried to ambush Hideyoshi by thrusting a spear through the floor beneath the warlord—a bold move that ultimately failed. The failed attack, however, earned Saizo a peculiar mercy: his life was spared on the condition that he swore allegiance to the Toyotomi clan.
Some scholars argue Saizo was merely a careless spy caught in the act, but his capture proved serendipitous for Hideyoshi. While Saizo was being interrogated, he uncovered a separate plot by double‑agent Yusuke Takiguchi to assassinate Hideyoshi. By exposing that conspiracy, Saizo inadvertently saved his new lord’s life, securing his own survival and a forced loyalty that would shape his remaining years.
8 Tomo Sukesada
Tomo Sukesada, a senior jonin of the Koga school, headed the Tomo‑Ryu tradition and earned a place in the annals of ninja warfare during the 1560s. When Tokugawa Ieyasu, then an ally of Oda Nobunaga, set out to crush the remnants of the Imagawa clan, the enemy retreated to the precipitous Kaminogō Castle, commanded by General Udono Nagamochi. The castle’s location made a direct assault nearly impossible, and the Imagawa had even taken members of Ieyasu’s family hostage.
To resolve the stalemate, Ieyasu commissioned a force of eighty Koga ninjas led by Sukesada. Working in tandem with the famed Hattori Hanzo, Sukesada’s men slipped into the fortress, ignited its watchtowers, and slaughtered roughly two hundred defenders, including the Imagawa general himself. The daring raid is chronicled in the Mikawa Go Fudoki, highlighting Sukesada’s tactical brilliance and his pivotal role in shaping the Tokugawa ascendancy.
7 Fujibayashi Nagato
Legend holds that Fujibayashi Nagato stood among the three greatest Iga jonin, alongside Momochi Sandayu and the ever‑famous Hattori Hanzo. As co‑head of the Iga clan, Nagato’s life is shrouded in mystery, yet his legacy is unmistakable. In 1581, Oda Nobunaga launched the brutal Tenshō Iga War, a campaign that devastated both Iga and Koga ninja forces. Surviving members, including Nagato, were forced into the service of Tokugawa Ieyasu, and Nagato met his end during the conflict.
Despite the scarcity of personal details, Nagato’s greatest contribution endures through the Bansenshukai, a multi‑volume compendium of ninjutsu techniques compiled by his descendants. This seminal text aggregates the secret arts of the Fujibayashi clan and serves as a primary source for modern understandings of ninja methodology.
6 Mochizuki Chiyome
Mochizuki Chiyome stands out as perhaps the most celebrated kunoichi—the female counterpart to the male ninja. A noblewoman married to samurai warlord Mochizuki Nobumasa, Chiyome is believed to have hailed from the Koga tradition. When her husband was away on campaign, she fell under the guardianship of his uncle, the illustrious daimyo Takeda Shingen. Recognizing her strategic mind, Shingen tasked her with assembling a covert network of women for espionage.
Chiyome established a headquarters in Nazu village, Shinshu, where she recruited up to three hundred orphaned girls, former prostitutes, and war‑displaced women. While locals thought she ran an orphanage, in reality she trained these women to infiltrate enemy lines as priestesses, geisha, or courtesans. Her kunoichi network served Shingen faithfully until his mysterious death in 1573, leaving a legacy of female empowerment in the shadowy world of ninja warfare.
5 Ishikawa Goemon
Although neither the Iga nor the Koga clans formally recognized him, Ishikawa Goemon is an essential figure on any list of historical ninjas. Born in 1558, Goemon became Japan’s answer to Robin Hood, stealing from affluent warlords and clergy to aid impoverished peasants. Legend claims he began as a genin—a ninja apprentice—under the tutelage of Iga master Sandayu Mochizuki before turning renegade, or nukenin.
Leading a band of Kansai outlaws, Goemon repeatedly raided wealthy samurai estates, distributing loot among the destitute. His downfall allegedly came after a botched assassination attempt on Toyotomi Hideyoshi. Captured and condemned, he met a gruesome end in 1594, boiled alive in a cauldron while, according to folklore, clutching his son above his head. The exact details remain murky, but his story endures as a symbol of rebellious justice.
4 Momochi Sandayu
Momochi Sandayu, a cornerstone of Iga Ryu Ninjutsu, is hailed as one of the trio of greatest Iga jonin, alongside Hattori Hanzo and Fujibayashi Nagato. Historical records suggest his real name was Momchi Tanbe Yasumitsu, though some scholars argue that Sandayu and Nagato may have been the same individual. Regardless of the identity debate, Sandayu’s influence on ninja doctrine is undeniable.
He met his demise during Oda Nobunaga’s 1581 invasion of Iga—a campaign that nearly eradicated both Iga and Koga shinobi. Known for maintaining three separate households, each with its own wife and family, Sandayu could disappear into a new identity whenever danger loomed, a testament to the ninja’s mastery of deception and survival.
3 Fuma Kotaro
The Fuma clan, operating independently of the Iga and Koga schools, served the Hojo daimyo of Odawara. Their fifth‑generation leader, Jonin Fuma Kotaro, commanded a band of roughly two hundred rappa—battle disruptors who doubled as brigands, pirates, and thieves. In 1580, when Takeda Shingen’s son Katsuyori assaulted the Hojo at Odawara Castle, Kotaro and his men slipped into the Takeda camp under cover of darkness.
Their sabotage was so effective that Takeda soldiers turned on one another in the ensuing chaos. After the Hojo’s defeat by Toyotomi Hideyoshi in 1590, the Fuma were reduced to ordinary bandits. A popular, though likely apocryphal, tale claims that Kotaro assassinated Hattori Hanzo in 1596, only to be betrayed by former Takeda ninja Kosaka Jinnai and finally beheaded on Tokugawa Ieyasu’s orders in 1603.
2 Kato Danzo
Kato Danzo earned his fame by blurring the line between ninja and sorcerer. An illusionist famed for feats like swallowing a live bull, instantly sprouting seeds, and even taking flight—hence the nickname Tobi Kato (Flying Kato)—he fascinated contemporaries who believed he possessed genuine supernatural powers. Modern researchers suspect his talents stemmed from masterful hypnosis, though definitive proof remains elusive.
Danzo’s reputation caught the eye of the warlord Uesugi Kenshin, who challenged him to steal a prized naginata from the vassal Naoe Kanetsugu. Danzo succeeded, infiltrating a heavily guarded castle, seizing the weapon, and even abducting a servant girl. Impressed, Kenshin recruited him, but Danzo soon fell out of favor—whether due to a plot by Kanetsugu or Kenshin’s growing suspicion, he defected to Takeda Shingen. Shingen, fearing Danzo’s duplicity, ordered his execution; Danzo was beheaded in 1569.
1 Hattori Hanzo
Hattori Hanzo stands as the most renowned ninja in Japanese history. A samurai vassal of Tokugawa Ieyasu, he was instrumental in Ieyasu’s rise to shogun. Growing up in Iga, Hanzo first distinguished himself in the turbulent 1570s, earning a reputation as a master spearman and tactician.
His most celebrated moment arrived in 1582 after Oda Nobunaga’s betrayal and death at the hands of Akechi Mitsuhide. Ieyasu found himself stranded near Mitsuhide’s forces, and Hanzo organized a daring escort: he united Iga ninjas with their former rivals, the Koga clan, to shepherd Ieyasu safely through hostile territory to Mikawa. Some accounts even credit Hanzo with rescuing Ieyasu’s captured family.
Hanzo’s loyalty never wavered; he led the Iga ninjas as the Tokugawa palace guard at Edo Castle, eventually forming the covert agency known as Oniwabanshu. After his death in 1596, his successors adopted his name, perpetuating a myth of immortality that kept the legend of Hattori Hanzo alive for centuries.