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Ninja

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The ninja were specialized agents in pre-modern Japan. They functioned primarily as spies, scouts, and infiltrators. While popular culture often portrays them as assassins, historical evidence for this is scarce. Instead, they were professional mercenaries who traded their secretive services for money.

Hokusai-sketches---hokusai-manga-vol6-crop
Hokusai-sketches---hokusai-manga-vol6-crop

This work was often done without the pursuit of honor or glory. This social role set them apart from the traditional samurai class.

To perform these tasks, ninja practiced a specialized system of warfare called ninjutsu. This involved many technical skills designed for stealth and survival. Historical manuals, such as the Kanrin Seiyō, detail specific training points. For instance, they learned to create makibishi, which are tools made from bamboo. They also developed footwear that allowed them to move without making sound.

Kanrinseiyo Middle Volume Ninja Manual 1748
Kanrinseiyo Middle Volume Ninja Manual 1748

Other techniques included listening for tiny sounds and using kuji-kiri to prevent dogs from barking.

The term "ninja" uses the kanji characters for "nin," meaning to hide or forbear, and "ja," meaning person. In Japan, they are also frequently called shinobi. This comes from the term shinobi-no-mono.

Ninja-kanji
Ninja-kanji

Historically, many different regional names were used to describe these agents. Some people called them monomi, meaning "one who sees." Others used the term nokizaru, which means "macaque on the roof." These names reflected the various ways people viewed their stealthy activities.

Tracing the origins of ninja involves both legend and documented history. Some stories link them to the 2nd-century prince Yamato Takeru.

Yamato Takeru at 16-crop
Yamato Takeru at 16-crop

However, these early accounts are likely not connected to the later mercenary groups. A more concrete history began around the 12th century. In 1162, a man named Daisuke Togakure moved to the mountains of southwest Honshu. He collaborated with a Chinese warrior-monk named Kain Doshi. Together, they formalized the guerrilla tactics that became known as ninjutsu. Daisuke's descendants later founded the Togakureryu, or the first ninja school.

During the Sengoku period, ninja organized themselves into highly structured groups. They often operated within specific territories and followed a clear rank system. At the top was the jōnin, or "upper person," who managed the group and hired out mercenaries. Below them were the chūnin, or "middle persons," who acted as assistants. The lowest rank was the genin, or "lower person." These genin were field agents drawn from the lower classes to carry out actual missions.

ReizanView
ReizanView

They filled roles such as kanchō (spies), teisatsu (scouts), kishu (surprise attackers), and konran (agitators).

The most famous ninja clans originated in the Iga and Kōga regions. These areas were located in remote, mountainous provinces. The inaccessibility of these mountains likely helped the groups develop in secret.

Remains of Hara castle
Remains of Hara castle

Between 1485 and 1581, daimyōs frequently hired Iga professionals for siege warfare, known as shirotori. This included specialized skills like night attacks and ambushes. The Kōga and Iga clans even formed a formal alliance around 1560. However, this era of independence ended when the leader Oda Nobunaga invaded Iga in 1581.

Despite the violence of these invasions, some ninja found new roles under the Tokugawa shogunate. After the Tokugawa era began, many ninja faded into obscurity. Some survivors, such as Hattori Hanzō, served as bodyguards for the Tokugawa leaders. In the early 1600s, a leader named Tōdō Takatora employed Iga-ryū ninja. He also used a class of part-time samurai called Musokunin. These individuals worked as farmers during times of peace but took up arms during war.

Ninja Historic Illustration 18th Century
Ninja Historic Illustration 18th Century

This transition shows how the specialized skills of the ninja were integrated into the new social order of Japan.

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🖼️ Images & Media (9)
File:Hokusai-sketches---hokusai-manga-vol6-crop.jpg
Hokusai-sketches---hokusai-manga-vol6-crop.jpg
File:Ninja-kanji.svg
Ninja-kanji.svg
File:Yamato Takeru at 16-crop.jpg
Yamato Takeru at 16-crop.jpg
File:ReizanView.JPG
ReizanView.JPG
File:Ninja Historic Illustration 18th Century.png
Ninja Historic Illustration 18th Century.png
File:Remains of Hara castle.jpg
Remains of Hara castle.jpg
File:Kanrinseiyo_Middle_Volume_Ninja_Manual_1748.png
Kanrinseiyo_Middle_Volume_Ninja_Manual_1748.png
File:Kumawakamaru by kuniyoshi - 24 paragons of filial piety.jpg
Kumawakamaru by kuniyoshi - 24 paragons...
File:Ogata_Shuma_vs_Python_from_Suikoden_of_Japanese_Heroes_by_Utagawa_Kuniyoshi.png
Ogata_Shuma_vs_Python_from_Suikoden_of_Jap...
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