Tokugawa Iemitsu, the eldest son of Tokugawa Hidetada, held a special place in the heart of his grandfather, Tokugawa Ieyasu. Although his younger brother Tadanaga was favored by their parents and initially considered as Hidetada’s successor, Ieyasu asserted that Iemitsu would inherit the position. Interestingly, during his childhood, Iemitsu shared the same name as his grandfather, Takechiyo.
In 1617, Iemitsu celebrated his Coming of Age ceremony, marking the official transition to adulthood and adopting the name Iemitsu. He was officially declared as the future shogun, a proclamation that was contested by his younger brother, sparking a bitter rivalry between them. When Hidetada passed away in 1632, Iemitsu, fearing his brother's ambitions, compelled Tadanaga to commit seppuku to eliminate any threat to his authority.
Moreover, Iemitsu disregarded the regents, a group of daimyo appointed by his father to serve as advisors, instead favoring his own circle of trusted friends. While this decision caused discontent among the daimyo, it led to the establishment of a robust and centralized government. Any dissent from the daimyo was swiftly dealt with, often resulting in their forced removal from positions of influence.
Iemitsu was responsible for implementing the Sankin Kotai system, which required daimyo to travel between their provinces and Edo (Tokyo), spending designated periods attending the court and maintaining separate residences in the city, where their families were held as hostages. This system served to control the daimyo and impose financial strain, limiting their ability to acquire arms, armor, and maintain large armies. Additionally, Iemitsu enforced Japan's isolationist policies, known as Sakoku, prohibiting foreigners from entering the country and restricting Japanese citizens from leaving. Foreign trade was strictly regulated and conducted solely at Deshima, a small island in Nagasaki.
Legend has it that in 1620, Iemitsu had a dispute with his childhood friend, as well as his homosexual partner and retainer, Sakabe Gozaemon, resulting in Gozaemon's death during a confrontation while they were bathing together. Seventeen years later, the Shimabara Rebellion erupted, with over 27,000 individuals killed or executed in protest against Iemitsu's policies.
Shogun Iemitsu passed away at the age of 47 on June 8, 1651, and was succeeded by his son, Tokugawa Ietsuna.
See also
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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.
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Hosokawa Sumimoto
Sumimoto came from the Hosokawa clan: he was the biological son of Hosokawa Yoshiharu and at the same time the adopted son of Hosokawa Masamoto, the heir of Hosokawa Katsumoto, one of the principal instigators of the Ōnin War. Masamoto was homosexual, never married, and had no children of his own. At first he adopted Sumiyuki, a scion of the aristocratic Kujō family, but this choice provoked dissatisfaction and sharp criticism from the senior vassals of the Hosokawa house. As a result, Masamoto changed his decision and proclaimed Sumimoto as his heir, a representative of a collateral branch of the Hosokawa clan that had long been based in Awa Province on the island of Shikoku. Almost immediately after this, the boy became entangled in a complex and bitter web of political intrigue.
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Honda Masanobu
Masanobu initially belonged to the retinue of Tokugawa Ieyasu, but later entered the service of Sakai Shōgen, a daimyo and priest from Ueno. This shift automatically made him an enemy of Ieyasu, who was engaged in conflict with the Ikkō-ikki movement in Mikawa Province. After the Ikkō-ikki were defeated in 1564, Masanobu was forced to flee, but in time he returned and once again entered Ieyasu’s service. He did not gain fame as a military commander due to a wound sustained in his youth; nevertheless, over the following fifty years he consistently remained loyal to Ieyasu.
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Honda Masazumi
Masazumi was the eldest son of Honda Masanobu. From a young age, he served Tokugawa Ieyasu alongside his father, taking part in the affairs of the Tokugawa house and gradually gaining experience in both military and administrative matters. At the decisive Battle of Sekigahara in 1600, Masazumi was part of the core Tokugawa forces, a clear sign of the high level of trust Ieyasu placed in him. After the campaign ended, he was given a highly sensitive assignment—serving in the guard of the defeated Ishida Mitsunari, one of Tokugawa’s principal enemies—an obligation that required exceptional reliability and caution.
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Hojo Shigetoki
Hōjō Shigetoki, the third son of Hōjō Yoshitoki, was still very young—only five years old—when his grandfather Tokimasa became the first member of the Hōjō clan to assume the position of shogunal regent.
