Tokugawa Ieyasu, the inaugural Tokugawa Shogun and the third of Japan's Three Great Unifiers, was born on January 31, 1543, at Okazaki Castle in Aichi Prefecture. In his youth, Ieyasu was entrusted as a hostage to the Imagawa clan by his father, Matsudaira Hidetada, who sought their aid in the struggle against the Oda. The Matsudaira clan found themselves sandwiched between the Oda to the west and the Imagawa to the northeast, sparking debate among their leaders regarding which rival warlord to align with. Ultimately, Hidetada opted to support the larger and stronger Imagawa faction.
During the journey to the Imagawa stronghold at Suruga, the convoy was misled by a renegade retainer of the Matsudaira clan to the camp of their adversary, Oda Nobuhide. Despite Nobuhide offering terms of peace under challenging conditions, Hidetada refused, even at the peril of his son's life. Consequently, Ieyasu was confined to Nobuhide's castle, where he possibly encountered Nobuhide's son, Nobunaga, and endured hardships at a temple in Nagoya. Subsequently, when the Imagawa attacked Anjo Castle and seized Oda Nobuhide's son three years later, Ieyasu was handed over to the Imagawa as part of the exchange.
Ieyasu participated in the pivotal 1560 clash between the Imagawa Yoshimoto and the Oda Nobunaga at Okehazama, where a mere 2,500 Oda samurai routed the massive army of 25,000 Imagawa soldiers. During this battle, Ieyasu, tasked with delivering supplies to Odaka Castle, found himself liberated from the grasp of the Imagawa clan following the demise of Imagawa Yoshimoto. Upon his return to Okazaki Castle, Ieyasu formed an alliance with Oda Nobunaga, who indirectly facilitated his newfound freedom.
In 1573, Ieyasu faced a dire situation when the Takeda clan launched an assault on his northern Totomi provinces during the Battle of Mikatagahara. However, four years later, with the support of Oda Nobunaga, he exacted vengeance by crushing the Takeda forces at the Battle of Nagashino. Subsequently, following Nobunaga's demise, Ieyasu clashed with Hideyoshi at the Battle of Komaki Nagakute in 1584, though their relationship would later ameliorate.
As Hideyoshi lay on his deathbed in 1598 after governing a unified nation for nearly 15 years, he summoned the 56-year-old Ieyasu and entrusted him with leading the council of regents responsible for overseeing his five-year-old son and designated heir, Toyotomi Hideyori.
Ieyasu willingly accepted the responsibility and, following the demise of the Taiko, or 'Great Chancellor' Hideyoshi, he assumed control from the opulent Fushimi Castle. Without delay, he initiated maneuvers to consolidate his authority over the nation. His assertive actions drew the criticism of many of his peers, leading to a division of the nation into two opposing factions: the east and the west. The confrontation between these formidable armies occurred on October 21, 1600, at the modest plain of Sekigahara, a crucial juncture where the Tokaido and Nakasendo highways intersected, marking the gateway between the country's dividing mountains. The outcome of this monumental battle favored Ieyasu, solidifying his position as the victor in what would be remembered as the largest, most intense, and decisive conflict in samurai history.
Three years following the Battle of Sekigahara, Ieyasu ascended to the esteemed title of Shogun, initiating a dynasty that would govern Japan for the subsequent 260 years.
Later records from Ieyasu's life indicate that he stood approximately 156.5cm tall. While he was slender in his youth, he gradually grew in size as he aged, with a waist circumference ranging from 100 to 120cm. Records of order forms for split toe tabi socks reveal his foot size to be 22.7cm. His inner leg measured about 80cm, with the length from knee to foot being 35cm. Hand prints suggest his hands spanned 18cm from the base of the palm to the fingertips. (Interestingly, his left hand displayed a single straight line across the palm, a trait palm readers often associate with greatness.) In times of stress, he was known to bite his nails, particularly those of his left little finger, sometimes causing them to bleed.
Ieyasu enjoyed outdoor activities such as hawking and swimming, maintaining an active lifestyle. He frequently swam in the moats of Edo Castle and later in Sumpu's moat. Despite his high rank, he preferred modest meals over lavish ones and showed a keen interest in health and fitness, studying medicinal practices. He often provided medical advice to his retainers and fellow daimyo.
Ieyasu passed away at the age of 73, a notable longevity in an era when the average lifespan was around 50 years. Legend has it that he died after eating tempura while falconing at Tanaka Castle in Shizuoka. However, modern researchers speculate that the oils from the tempura may have aggravated Ieyasu's stomach cancer, contributing to his demise.
His body rests atop Kunouzan near the Kunouzan Toshogu in Shizuoka, while his spirit is honored at the splendid Toshogu shrine in Nikko.
See also
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Sakakibara Yasumasa
Yasumasa was the second son of Sakakibara Nagamasa and was born in Ueno in Mikawa Province. From a young age, he began serving Tokugawa Ieyasu and eventually rose to the position of one of his most trusted generals. His wife was the daughter of Osuga Yasutaka. Ieyasu first noticed the young Yasumasa during the suppression of the Ikkō-ikki uprising in Mikawa in 1564. Thanks to his demonstrated abilities, Yasumasa was granted the privilege of using the character “yasu”—the second character of Ieyasu’s own name—in his own. Although he was the second child in his family, he became his father’s heir, though the exact reasons for this remain unknown.
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Sakai Tadatsugu
Tadatsugu was one of the most renowned generals serving Tokugawa Ieyasu. After Ieyasu broke ties with the Imagawa clan, Tadatsugu—an ardent supporter of this decision—was granted command of Yoshida Castle in 1565, which controlled the coastal road from Tōtomi to Mikawa. During the Battle of Mikatagahara in 1573, he held the right flank of the Tokugawa forces even when the troops sent by Oda fled under the assault of the Takeda army. In the Battle of Nagashino in 1575, he personally requested permission to carry out a night attack on the Takeda camp, which he executed brilliantly together with Kanamori Nagachika.
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Ryuzoji Takanobu
Takanobu was the eldest son of Ryūzōji Takaie and the great-grandson of Ryūzōji Iekane. His father was killed by a man named Baba Yoritiku in 1544. At a young age, Takanobu took Buddhist vows and received the monastic name Engetsu. However, around the age of eighteen, he returned to secular life, and in 1548, after the death of Ryūzōji Tanehide, he became the head of both branches of the Ryūzōji family.
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Ouchi Yoshihiro
Ōuchi Yoshihiro was the second son of Ōuchi Hiroyo, who headed the Ōuchi clan in the western part of Honshu. In 1363, Shogun Ashikaga Yoshimitsu confirmed the Ōuchi family in the position of shugo of Suō and Nagato Provinces. In his youth, Yoshihiro assisted his father in strengthening the influence of the Northern Court on the island of Kyushu — they served under Imagawa Ryōsun, who had been tasked with subjugating the nine provinces of Kyushu.
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Ouchi Yoshioki
Ouchi Yoshioki, the ruler of the provinces of Suo, Nagato, and Iwami, was one of the most capable military commanders and politicians of the late 15th and early 16th centuries. The son of Ouchi Masahiro, he governed from his residence in Yamaguchi in the province of Suo. In 1499, Yoshioki gave refuge to Shogun Ashikaga Yoshitane, who had been driven out of Kyoto by Hosokawa Masamoto. Shogun Yoshizumi, Masamoto’s protégé, ordered the lords of Kyushu to unite their forces against Yoshioki; however, they did not dare to do so, fearing the power of a man who by that time controlled six provinces. Having gathered a substantial army, Yoshioki marched from his native Suo toward Kyoto in order to restore Shogun Yoshitane to power.
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Otomo Sorin
Ōtomo Yoshishige came from a noble lineage, being the eldest son of Ōtomo Yoshiaki, the ruler of Funai Province. The roots of the Ōtomo family traced back to Fujiwara Hidesato, the adopted son of Nakahara Chikayoshi. Fujiwara served Minamoto Yoritomo during the Genpei War and took part in battles in Mutsu Province in 1189. In 1193, he was appointed shugo of Buzen and Bungo Provinces, after which he adopted a new surname—Ōtomo.
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Okudaira Sadamasa
Sadamasa was the son of Okudaira Sadayoshi and took part in several battles under Tokugawa Ieyasu, distinguishing himself in the Battle of Anegawa in 1570, where he took two heads. Around 1572 he was forced to enter the service of the Takeda clan, but after the death of Takeda Shingen in 1573 he returned to Tokugawa, leaving Tsukude Castle together with his men. As a result of this defection, Takeda Katsuyori ordered the execution of Sadamasa’s wife and brother, who were being held as hostages.
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Okubo Tadatika
Tadatika, the son of Okubo Tadayō, entered the service of Tokugawa Ieyasu at the age of eleven, and took his first head in battle when he was sixteen. After the establishment of the Tokugawa shogunate, he was appointed as a rōjū — a senior bakufu official — and was regarded as one of Ieyasu’s most trusted advisors, alongside Honda Masanobu. He is also known for his military chronicle Mikawa Monogatari, which describes Ieyasu’s rise to power and the early years of the Tokugawa shogunate.
