was a Japanese Ninja

Ninja

A or was a covert agent or mercenary of feudal Japan specializing in unorthodox arts of war. The functions of the ninja included espionage, sabotage, infiltration, and assassination, as well as open combat in certain situations...

 and member of the main Oda clan

Oda clan

The was a family of Japanese daimyo who were to become an important political force in the unification of Japan in the mid-16th century. Though they had the climax of their fame under Oda Nobunaga and fell from the spotlight soon after, several branches of the family would continue on as daimyo...

 of Owari Province

Owari Province

was an old province of Japan that is now the western half of present day Aichi Prefecture, including much of modern Nagoya. Its abbreviation is Bishū .-History:The province was created in 646....

 during the Sengoku

Sengoku period

The or Warring States period in Japanese history was a time of social upheaval, political intrigue, and nearly constant military conflict that lasted roughly from the middle of the 15th century to the beginning of the 17th century. The name "Sengoku" was adopted by Japanese historians in reference...

 (16th century) and Azuchi-Momoyama period

Azuchi-Momoyama period

The came at the end of the Warring States Period in Japan, when the political unification that preceded the establishment of the Tokugawa shogunate took place. It spans the years from approximately 1573 to 1603, during which time Oda Nobunaga and his successor, Toyotomi Hideyoshi, imposed order...

s. Nobusumi was the son of Oda Nobuyuki

Oda Nobuyuki

was the son of Oda Nobuhide, and younger brother of Oda Nobunaga in the earlier years of the Sengoku period of the 16th century of Japan.Nobuyuki conspired against his brother Nobunaga with the Hayashi and Shibata families. Nobuyuki's Suemori Castle was reduced by Ikeda Nobuteru. Though Hayashi and...

, thus making the famed Oda Nobunaga

Oda Nobunaga

was the initiator of the unification of Japan under the shogunate in the late 16th century, which ruled Japan until the Meiji Restoration in 1868. He was also a major daimyo during the Sengoku period of Japanese history. His opus was continued, completed and finalized by his successors Toyotomi...

 his uncle. Even though the Oda clan had fallen after the treacherous acts of Akechi Mitsuhide

Akechi Mitsuhide

, nicknamed Jūbei or called from his clan name and title, was a samurai who lived during the Sengoku period of Feudal Japan.Mitsuhide was a general under daimyo Oda Nobunaga, although he became infamous for his betrayal in 1582, which led to Nobunaga's death at Honno-ji...

 when he burned Honnō-ji

Honno-ji

is a temple of the Nichiren branch of Buddhism located in Kyoto, Japan. Its honzon is mandara-honzon from Nam Myoho Renge Kyo.-History:...

 during the Incident at Honnō-ji, Nobusumi was allowed to marry the daughter of Mitsuhide. This had been ordered by Nobuyuki before his death. Nobusumi himself would be killed at Osaka the following year in 1583 by Oda Nobutaka

Oda Nobutaka

was a samurai and member of Oda clan. He was adopted as the head of Kanbe clan that ruled the middle region of Ise Province and was also called Kanbe Nobutaka ....

, due to Nobtutaka's suspicion of him with the marriage to Mitsuhide's daughter, and the death his father Nobuyuki by the hands of Nobunaga.