A ninja or shinobi was a covert agent, mercenary, or guerrilla warfare expert in feudal Japan. The functions of a ninja included siege and infiltration, ambush, reconnaissance, espionage, deception, and later bodyguarding and their fighting skills in martial arts, including ninjutsu. Their covert methods of waging irregular warfare were deemed dishonorable and beneath the honor of the samurai. Though shinobi proper, as specially trained warriors, spies, and mercenaries, appeared in the 15th century during the Sengoku period, antecedents may have existed as early as the 12th century.
Ninjutsu (忍術), sometimes used interchangeably with the modern term ninpō (忍法), is the martial art strategy and tactics of unconventional warfare, guerrilla warfare, insurgency tactics and espionage purportedly practised by the ninja. Ninjutsu was a separate discipline in some traditional Japanese schools, which integrated study of more conventional martial arts (taijutsu) along with shurikenjutsu, kenjutsu, sōjutsu, bōjutsu and others.
A wedding ring or wedding band is a finger ring that indicates that its wearer is married. It is usually forged from metal, traditionally gold or another precious metal. Rings were used in ancient Rome during marriage.
A Claddagh ring is a traditional Irish ring in which a heart represents love, the crown stands for loyalty, and two clasped hands symbolize friendship.
The chakram is a throwing weapon from the Indian subcontinent. It is circular with a sharpened outer edge and a diameter of 12–30 cm (4.7–11.8 in). It is also known as chalikar meaning "circle", and was sometimes referred to in English writings as a "war-quoit". The chakram is primarily a throwing weapon, but can also be used hand-to-hand. A smaller variant called chakri is worn on the wrist. A related weapon is the chakri dong, a bamboo staff with a chakri attached at one end.
A kunai is a Japanese tool thought to be originally derived from the masonry trowel. The two widely recognized kinds are the short kunai and the big kunai. Although a basic tool, the kunai, in the hands of a martial arts expert, could be used as a multi-functional weapon. The kunai is commonly associated with the ninja, who in folklore use them to climb walls.
The ring finger, third finger, fourth finger, leech finger, or annulary is the fourth digit of the human hand, located between the middle finger and the little finger.
The little finger or pinkie, also known as the baby finger, fifth digit, or pinky finger, is the most ulnar and smallest digit of the human hand, and next to the ring finger.
A gauntlet is a type of glove that protects the hand and wrist of a combatant. Gauntlets were used particularly in Europe between the early fourteenth century and the early modern period and were often constructed of hardened leather or metal plates.
Tenchu is an action-adventure stealth video game series, originally developed by Japanese developer Acquire, where the player assumes the role of a ninja in 16th-century Japan. The title in Japanese literally translates in English as "Divine Retribution", with 天 (ten) meaning heaven and 誅 (chū) meaning death penalty.
Hensōjutsu (変装術) was a Japanese martial art skill involving disguise, impersonation, and infiltration.
A ring is a round band, usually made of metal, worn as ornamental jewelry. The term "ring" by itself denotes jewellery worn on the finger; when worn as an ornament elsewhere, the body part is specified within the term, e.g., earrings, neck rings, arm rings, and toe rings. Rings fit snugly around or in the part of the body they ornament, so bands worn loosely, like a bracelet, are not rings. Rings may be made of almost any hard material: wood, bone, stone, metal, glass, jade, gemstone or plastic. They may be set with gemstones or with other types of stone or glass.
The kyoketsu-shoge is a double-edged blade, with another curved blade attached near the hilt at a 45–60 degree angle. This is attached to approximately 10 to 18 feet (3–5 m) of rope, chain, or hair which then ends in a large metal ring. Likely used by ninja of the Iga province, it is thought to be a forerunner to the later more widely known kusarigama. Ninja were often recruited from the class of rural peasantry who resided on remote farmland, and the tool's resemblance to farming equipment and high versatility gave it many benefits in stealth combat.
A shobo is a weapon, similar to the Emeici of China, which was used by the ninja of Japan for striking pressure points on an opponent. It was a piece of wood that was gripped by the wielder and was hung by a ring worn on the middle finger. Some versions were rings with a wooden peg attached on top. The ends were exposed and were usually sharp, which made them effective for paralyzing and even killing enemies quickly and without leaving a trace. They were easily hidden in the fists and were very lightweight and portable. They were usually worn in pairs. Many ninjas constructed their own shobo, although some were given from master to student.
A ninja was a secret agent or mercenary of feudal Japan specializing in unorthodox arts of war.
In the history of Japan, ninja operated as spies, assassins, or thieves; they formed their own caste outside the usual feudal social categories such as lords, samurai, and serfs. Ninja often appear as stock characters in Japanese and global popular culture.
Nintama Rantarō is a Japanese anime series produced by Ajia-do Animation Works and Japanese broadcast on NHK since April 10, 1993. It is an adaptation of the manga series Rakudai Ninja Rantarō, written and illustrated by Sōbe Amako. Nintama Rantarō centers on the title character and his friends as they attend a school for budding ninjas. Like the manga on which it is based, there is a considerable amount of anachronisms for comedic purposes; for example, the titular character Rantarō is bespectacled. The anime also references other Japanese media personalities such as Ken Shimura. The series is currently the longest-running anime on NHK. The official English title is Ninjaboy Rantaro.
Kunoichi is a Japanese cant term for "woman". In popular culture, it is often used for female shinobi or practitioner of ninjutsu (ninpo). The term was largely popularized by novelist Yamada Futaro in his novel Ninpō Hakkenden (忍法八犬伝) in 1964.
Togakure-ryū (戸隠流) is a historical tradition of ninjutsu known as the "School of the Hidden Door", allegedly founded during the Oho period (1161–1162) by Daisuke Nishina (仁科大助), who learned his original fighting techniques from a Chinese monk named Kain Dōshi. However, the history and early lineage of Togakure-ryū may be impossible to verify due to the antiquity of the time period and its claimed historicity has been disputed by Watatani Kiyoshi, writer for the Bugei Ryūha Daijiten. After Togakure, the title of Sōke was recorded by Toda Shinryuken Masamitsu to have been passed down through other practitioners that kept the style secret from the outside world.
Umemura Sawano was a Kunoichi who is thought to have served the Takeda clan. 竊奸秘伝書, the 13 meters long ninjutsu scroll handed down in Matsushiro Domain introduced her as the founder of this school of ninja. Sanada clan, the daimyō of Matsusiro domain was former retainer of Takeda clan and Umemura Sawano worked for him.
