* Image is for illustrative purposes only.Shimazu Iehisa
島津家久
The Iron Fist of Satsuma — The General Who Slew Ryūzōji Takanobu at Okitanawate
Description
The Youngest of the Four Shimazu Brothers: Iehisa
Born in Tenbun 16 (1547) in Satsuma Province, Shimazu Iehisa was, alongside Yoshihisa, Yoshihiro, and Toshihisa, one of the "Four Shimazu Brothers" and a fierce general who supported the Shimazu clan's relentless drive toward the conquest of Kyushu. Known among the four brothers as the most straightforward warrior, Iehisa combined elegant military strategy with personal martial prowess, and was one of the principal architects who perfected the "tsurinobuse"—the Shimazu clan's distinctive strategy of feigned retreat that lured enemy forces into a prepared ambush.
The Battle of Okitanawate—The Subjugation of Ryūzōji Takanobu
In March of Tenshō 12 (1584), at Okitanawate (present-day area around Isahaya City, Nagasaki Prefecture), Iehisa achieved total victory against Ryūzōji Takanobu's thirty-thousand-strong army with merely six thousand troops, employing tsurinobuse tactics. Ryūzōji Takanobu was the most powerful daimyō in Kyushu at that time, commanding vast territories across Hizen, Higo, and Chikugo. Drawn by Iehisa's stratagem into the marshes, the Ryūzōji forces suffered catastrophic defeat, and Takanobu himself was cut down. This unprecedented great victory—annihilating a thirty-thousand-strong force with six thousand troops—proved Iehisa's strategic genius and the overwhelming combat prowess of the Shimazu forces.
Satsuma Sword Culture and Iehisa
Satsuma Province held a unique and vital position in the world of Japanese sword-making. The works of Satsuma sword smiths, known as "Satsuma Shintō," possessed powerful characteristics optimized for the practical, direct fighting style of Satsuma warriors forged through the gōjū (郷中) educational system. The Satsuma sword smiths—those in the lineage of masters such as Masukuni, Kiyokuni, Masashiro, and Namikaze Yukiyasu—prioritized "blades that actually cut" for the warrior-servants who commissioned them, a philosophy of craftsmanship that Iehisa himself embodied as a general who personified the aesthetics of the Satsuma blade.
The Shimazu Gōjū and the Spirit of the Blade
The way of the warrior embodied by Iehisa was rooted in the distinctive gōjū (郷中) educational system of the Shimazu clan. In this system, where boys underwent martial training from youth as a complete way of life, the sword transcended mere weapon to become a tool for spiritual cultivation. The spirit of Satsuma warriors—"loss is not shameful, but retreat is"—was directly manifested in Iehisa's conduct at the Battle of Okitanawate; his bravery in charging six thousand against thirty thousand was itself the embodiment of this spirit.
Sudden Death in Bungo and Its Mystery
In Tenshō 15 (1587), after the Shimazu clan's surrender during Toyotomi Hideyoshi's Kyushu campaign, Iehisa died suddenly in Bungo Province. His death is shrouded in mystery, with suspicions of poisoning. Merely three years after his great victory at Okitanawate, the sudden death of Iehisa—the strongest general who had spearheaded the Shimazu clan's conquest of Kyushu—left posterity with many unanswered questions and much to mourn. Without Iehisa, the Shimazu clan would later create another legend of martial valor: his brother Yoshihiro's "Shimazu no Nokiguchi" (the Shimazu Retreat) at Sekigahara.
Notable Swords
- Satsuma Shintō tachi — the battle sword forged by Satsuma provincial smiths in the direct, powerful style demanded by the gōjū warrior tradition; the blade that accompanied Iehisa through the Okitanawate campaign embodies the Satsuma principle of total commitment — the six thousand men who charged thirty thousand needed swords that would not fail them
- Okitanawate charge sword — the uchigatana Iehisa drew when the tsurinobuse trap closed and the final assault began; the weapon that participated in one of the greatest upsets in Sengoku military history; after the fighting, a blade that had helped end the Ryūzōji dynasty and made Shimazu the masters of Kyushu