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.
In 1496, Nagachika succeeded his father as the head of the main branch of the Matsudaira clan. At the time, the Matsudaira clan was locked in a bitter conflict with the neighboring Imagawa clan over control of Mikawa Province. Shortly after assuming leadership, Nagachika was attacked by Imagawa Ujichika but emerged victorious after a hard-fought battle.
Beyond his military achievements, Nagachika was also skilled in the art of renga poetry. His decade-long leadership was marked by the consolidation of the Matsudaira family's power in Mikawa—a foundation that would later prove crucial for the rise of Tokugawa Ieyasu.
In 1508, conflict with the Imagawa reignited, and Nagachika once again successfully repelled their forces. That same year, he formally passed leadership of the clan to his eldest son, Nobutada, then 28 years old, and retired. However, despite stepping down, Nagachika continued to fight alongside Nobutada and later served as guardian to his grandson, Kiyoyasu.
Nobutada struggled with leadership and alienated many of the Matsudaira clan's vassals. Under pressure and fearing for his life, he relinquished power to his son, Kiyoyasu, and withdrew from public affairs. Nagachika then took on the role of mentor to his grandson, just as he had with his son.
Under Nagachika’s guidance in the early 1530s, Kiyoyasu pressed forward against the Imagawa, particularly in eastern Mikawa. However, internal clan tensions remained. Kiyoyasu faced rivalry from his uncle, Matsudaira Nobusada, and animosity from vassal Abe Masatoyo. On December 5, 1535, Abe Masatoyo assassinated Kiyoyasu, who was just 24 years old at the time.
Following Kiyoyasu’s death, a power struggle over leadership of the Matsudaira clan erupted between Nobusada and Kiyoyasu’s nine-year-old son, Matsudaira Hirotada. Hirotada, who would later become the father of Tokugawa Ieyasu, sought support by aligning himself with the Imagawa clan.Though briefly ousted from Mikawa by Nobusada, Hirotada managed to rally enough support to reclaim leadership. However, Nobusada remained a persistent source of trouble.
Over time, Hirotada solidified his authority, while his great-grandfather, Matsudaira Nagachika, withdrew completely from clan affairs. Nagachika died on August 22, 1544, at the age of 72.
See also
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Takeda Nobuyoshi
Takeda Nobuyoshi (1128–1186 or later) was a prominent Japanese samurai lord of the late Heian and early Kamakura periods and the founder of the Takeda clan.
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Tokugawa Iemochi
Tokugawa Iemochi (1846–1866) was the fourteenth shōgun of the Tokugawa shogunate and ruled from 1858 until his death. His reign came during the turbulent final years of the shogunate, when Japan faced growing Western pressure and serious internal political conflict.
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Tokugawa Ienari
Tokugawa Ienari (1773–1841) was the eleventh shōgun of the Tokugawa shogunate and ruled from 1787 to 1837, making him the longest-serving Tokugawa shōgun. He was a great-grandson of the eighth shōgun, Tokugawa Yoshimune.
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Matsudaira Nobuyasu
Matsudaira Nobuyasu was only twenty years old when his father ordered him to commit seppuku. The reason was not a defeat in battle, but a crisis inside the Tokugawa family that had become too dangerous to ignore.
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Yamagata Masakage
Masakage was one of Takeda Shingen’s most loyal and capable commanders. He was included in the famous list of the “Twenty-Four Generals of Takeda Shingen” and also belonged to the inner circle of four especially trusted warlords known as the Shitennō.
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Yagyu Munenori
Yagyū Munenori began his service under Tokugawa Ieyasu while his father, Yagyū Muneyoshi, was still at his side. In 1600, Munenori took part in the decisive Battle of Sekigahara. As early as 1601, he was appointed a kenjutsu instructor to Tokugawa Hidetada, Ieyasu’s son, who later became the second shogun of the Tokugawa clan.
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Yagyu Muneyoshi
A samurai from Yamato Province, he was born into a family that had been defeated in its struggle against the Tsutsui clan. Muneyoshi first took part in battle at the age of sixteen. Due to circumstances beyond his control, he was forced to enter the service of the Tsutsui house and later served Miyoshi Tōkei. He subsequently came under the command of Matsunaga Hisahide and in time became a vassal first of Oda and later of Toyotomi.
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Endo Naozune
Naozune served under Azai Nagamasa and was one of the clan’s leading vassals, renowned for his bravery and determination. He accompanied Nagamasa during his first meeting with Oda Nobunaga and at that time asked for permission to kill Nobunaga, fearing him as an extremely dangerous man; however, Nagamasa did not grant this request.
