Tsutsui Sadatsugu (June 6, 1562 – April 2, 1615) was a prominent figure in the Sengoku and early Edo periods, known as the cousin and adopted heir of Tsutsui Junkei, the feudal lord of Yamato Province. Following Junkei's death in 1584, Toyotomi Hideyoshi relocated Sadatsugu to Iga Province, where he oversaw the construction of Iga Ueno Castle, marking the height of his prominence.
Sadatsugu demonstrated his loyalty to Hideyoshi by participating in the 1585 invasion of Shikoku against the Chōsokabe clan. Later, in 1600, he sided with Tokugawa Ieyasu's Eastern Army at the decisive Battle of Sekigahara, aligning himself with the emerging Tokugawa shogunate.
However, Sadatsugu’s fortunes took a downturn in 1608 when the Tokugawa shogunate accused him of misgoverning his domain. Officially, his removal and the forced abolition of the Tsutsui clan were attributed to administrative failings. Historians, however, suggest deeper political motives. Sadatsugu’s unsanctioned visits to Toyotomi Hideyori at Osaka Castle and the strategic importance of Iga Province likely raised suspicions. The confiscation of his lands, subsequently granted to Tōdō Takatora—a close ally of Ieyasu—was seen as a calculated move to secure the shogunate's influence over key territories without directly antagonizing the Toyotomi faction.
In 1615, during the Winter Siege of Osaka, Sadatsugu was accused of secretly communicating with Toyotomi loyalists and was ordered by the shogunate to commit seppuku. Tragically, his son, Tsutsui Juntei, perished in the Summer Siege of Osaka that same year. With their deaths, the Tsutsui clan ceased to exist, a stark reminder of the volatile and unforgiving nature of the era.
See also
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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.
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Takigawa Kazumasu
Takigawa Kazumasu (1525 – October 21, 1586), also known as Takikawa Sakon or Sakonshogen, was a prominent samurai and daimyō of the Sengoku period. He served as a loyal retainer and military commander under Oda Nobunaga and later Toyotomi Hideyoshi. His biological son, Toshimasu, was adopted by Maeda Toshihisa, the elder brother of Maeda Toshiie, and Kazumasu served alongside Toshiie in Nobunaga’s campaigns.
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Sanada Yukitaka
Sanada Yukitaka (c. 1512 – June 8, 1574) was a renowned samurai warrior of the Sengoku period, best known as one of the "Twenty-Four Generals of Takeda Shingen." He was the father of Sanada Nobutsuna and Sanada Masayuki, as well as the grandfather of the legendary Sanada Yukimura, who later served the Toyotomi clan.
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Torii Mototada
Torii Mototada (1539 – September 8, 1600) was a Japanese samurai and daimyo who lived through the Sengoku and late Azuchi–Momoyama periods. A loyal retainer of Tokugawa Ieyasu, he is best remembered for his heroic last stand at the Siege of Fushimi, an event that played a crucial role in shaping Japanese history.
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Toyotomi Hideyori
Toyotomi Hideyori (August 28, 1593 – June 4, 1615) was the son and designated successor of Toyotomi Hideyoshi, the general who first unified Japan. His mother, Yodo-dono, was Oda Nobunaga's niece.
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Okubo Tadanori
Okubo Tadanori (January 13, 1842 – August 10, 1897) was the 9th daimyo of Odawara Domain in Sagami Province (modern-day Kanagawa Prefecture) during the late Edo period. Before the Meiji Restoration, he held the courtesy title of Kaga no Kami.
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Okubo Tadayo
Okubo Tadayo (1532 – October 28, 1594) was a samurai general who served Tokugawa Ieyasu during the Azuchi–Momoyama period and later became the daimyo of Odawara Domain in the early Edo period.
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Araki Murashige
Araki Murashige (1535 – June 20, 1586) was a samurai and retainer of Ikeda Katsumasa, the head of the powerful Settsu-Ikeda clan in Settsu Province. Initially serving under Katsumasa, he aligned himself with Oda Nobunaga after Nobunaga’s successful campaign to establish control over Kyoto.
