
Niwa Nagahide, born in 1535 in Aichi, Owari Province (present-day Nishi-ku in Nagoya City), played a crucial role in the historical landscape of feudal Japan. Directly serving Oda Nobunaga, he earned a distinguished position as one of Nobunaga's most esteemed senior vassals.
Throughout his career, Nagahide actively participated in numerous significant battles, showcasing his unwavering loyalty. The Battle of Nagakute in 1584 stands as an exception, as illness prevented his direct involvement in the fighting during that campaign.
Nobunaga held Nagahide in high regard, exemplified by Nagahide's marriage to Nobunaga's adopted daughter. Additionally, his son, Nagashige, wed Nobunaga's fourth daughter. In recognition of his leadership prowess, Nagahide was granted Wakasa Province (currently southern Fukui Prefecture) and Sawayama Castle in Omi (Shiga Prefecture). Nobunaga entrusted him with the construction of Azuchi Castle, showcasing the deep trust between lord and vassal.
A significant honor came in 1581 when Niwa Nagahide was selected to lead a grand military parade orchestrated by Nobunaga. This spectacle served both as a demonstration of authority and as public entertainment for the Emperor, the Imperial Court, foreign missionaries, and the people of Kyoto.
Tragedy struck in 1582 when Nagahide accompanied Oda Nobutaka on a campaign to quell Shikoku, following Nobunaga's orders. However, the campaign was abruptly halted by the Honno-ji Incident, where Akechi Mitsuhide betrayed and felled Nobunaga. Promptly abandoning the campaign, Nagahide joined forces with Toyotomi Hideyoshi to avenge their fallen master. He continued to support Hideyoshi during the Kiyosu Kaigi, a pivotal meeting held at Kiyosu Castle to determine the future of the Oda clan.
Nagahide played a crucial role in the conflict against Shibata Katsuie at Shizugatake under Hideyoshi's leadership. In recognition of his contributions, he was awarded Echizen and Kaga Provinces (present-day Fukui and Ishikawa Prefectures), attaining daimyo status with an income of 1,230,000 koku.
Regrettably, Niwa Nagahide passed away on May 15, 1585. While some records attribute his death to illness, others suggest that he committed seppuku, driven by a sense of guilt for inadvertently playing a significant role in Hideyoshi's rise to power within the Oda clan.
See also
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Asai (Azai) Nagamasa

Asai Nagamasa inherited power from his father, Asai Hisamasa, when he was only fifteen years old. Both brave and impulsive, he proved himself a capable commander, managing to regain lands from the Rokkaku clan that had previously been lost by his father. After a territorial dispute with Oda Nobunaga over the province of Mino, Nagamasa formed an alliance with Nobunaga and married his sister Oichi, who was famous for her beauty. In 1570, when Oda Nobunaga declared war on the Asakura family, Nagamasa sided with the Asakura because he had long-standing ties with them. This unexpected move threatened Nobunaga's invasion of the Asakura lands by threatening him from the rear. Oda managed to save his army, not without the help of Tokugawa Ieyasu, but relations between Nobunaga and Asai were permanently damaged.
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Amano Yasukage

Yasukage was born into the family of the samurai Amano Kagetaka and was given the name Matagoro at birth. He later changed his name to Kageyoshi, and then to Yasukage. From an early age, Yasukage served Tokugawa Ieyasu and accompanied him when he was held hostage by Imagawa Yoshimoto. His loyalty and devotion to Ieyasu from a young age laid the foundation for Yasukage's future military and administrative career.
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Amago Tsunekisa

The Amago clan (also spelled Amako) was founded in 1392, when Sasaki Takahisa, who was orphaned at the age of three, took the new surname Amago, meaning “son of a nun,” in honor of the nun who raised him. Since the Sasaki family descended from Emperor Uda (866–931), the Amago clan traced its lineage back to this emperor. From around 1396, the Amago clan's headquarters was the mountain castle of Gassan-Toda in Izumo Province. Until the start of the Onin War, the Amago clan remained a minor clan in the service of the Kyogoku clan, which was also a descendant of the Sasaki clan. The Amago clan historically held the position of vice-governor of Izumo Province.
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Abe Masakatsu

Masakatsu came from the ancient Abe clan, whose progenitor, according to the Nihon Shoki chronicle, is considered to be Prince Ohiko-no-mikoto (2nd century BC), son of Emperor Kogen. From the Nara period (710–784), members of the Abe clan held high positions in the government, including at the ministerial level, and from the Heian period (794–1185) onwards, the clan gained widespread fame, which continued until the Edo period.
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Toyotomi Hidenaga
Toyotomi Hidenaga was an outstanding military commander and strategist of his time, who was unjustly overshadowed by his half-brother, the great Toyotomi Hideyoshi. At different stages of his life, he was known by the names Kinoshita Koichiro, Hashiba Nagahide, and Hashiba. Despite his relative obscurity among the general public, Hidenaga was considered one of the best minds of his time, on par with the renowned Kuroda Kanbei.
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Matsudaira Nagachika

Matsudaira Nagachika (1473–1544?) was a daimyō of Japan’s Sengoku period and the third son of Matsudaira Chikatada. He was also the great-grandfather of Tokugawa Ieyasu.
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Oishi Yoshio

Oishi Yoshio (April 24, 1659 – March 20, 1703) served as the chamberlain of the Ako Domain in Harima Province, now part of modern-day Hyogo Prefecture, from 1679 to 1701. He is best known as the leader of the Forty-seven Rōnin in their 1703 vendetta and is honored as the central figure in the legendary tale of Chūshingura.
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Asano Nagaakira

Asano Nagaakira (March 18, 1586 – October 16, 1632) was a Japanese samurai and daimyō of the early Edo period. He initially ruled Wakayama Domain before being transferred to the Hiroshima Domain, where his family would remain until the Meiji Restoration.
