Shimazu Tadatsune
A cunning warlord who bent the knee to the Tokugawa to secure his power, becoming the first Japanese ruler of the Ryukyu Kingdom.
1576–1638 (age 62)·16/17th-century Japanese warlord; leader of Satsuma Domain·Birthday: November 27
Biography
Shimazu Tadatsune was the shrewd lord of Satsuma, a domain whose power in southern Japan was both immense and dangerously independent. In the wake of the epic Battle of Sekigahara, he made a calculated move: formally submitting to the victorious Tokugawa Ieyasu. This act of political theater was rewarded with the supreme honor of a Tokugawa family name, allowing him to operate with remarkable autonomy. His true legacy was forged overseas. Tadatsune launched a brutal invasion of the Ryukyu Kingdom in 1609, bringing the island chain under Satsuma's economic thumb while letting its kings maintain a facade of independence for trade with China. This masterstroke of indirect rule funneled wealth into his coffers and positioned Satsuma as a unique gateway for foreign goods and ideas, a strategic advantage that would shape Japanese history for centuries.
#1 When Shimazu Was Born
The biggest hits of 1576
Shimazu's Life & Times
The world at every milestone
1576Born
1581Started school
1589Became a teenager
1592Could drive
1594Could vote
1597Turned 21
1606Turned 30
1616Turned 40
1626Turned 50
1636Turned 60
1638Died at 62
Key Achievements
- Successfully invaded and established Satsuma's suzerainty over the Ryukyu Kingdom in 1609.
- Secured his domain's autonomy by formally submitting to Tokugawa Ieyasu and receiving the honored name Matsudaira Iehisa.
- Governed one of Japan's largest fiefs, assessed at over 600,000 koku of rice.
- Preserved the Shimazu clan's power through the risky transition into the Tokugawa shogunate.
Did You Know?
The invasion of Ryukyu was partly motivated by the kingdom's refusal to support the Shimazu during the Japanese invasions of Korea.
He was a patron of the arts and tea ceremony, studying under the master Furuta Oribe.
His rule saw the introduction of sweet potatoes to Satsuma from the Ryukyus, a crop that later helped avert famines.
“Submit to the shogun's authority, but keep your swords sharp and your cannons loaded.”
