Kuroda Nagamasa (黒田 長政?, December 3, 1568 – August 29, 1623) was a daimyo of Japan. He was the son of Kuroda Kanbei.
In 1577, When Nagamasa was a small child, his father was condemned as a spy by Oda Nobunaga. Nagamasa was kidnapped and nearly killed as a hostage. Takenaka Hanbei ended up rescuing him.
Nagamasa served under Tokugawa Ieyasu during the Battle of Sekigahara. His men killed Shima Sakon, securing victory for the Eastern army. He also participated in the first Korean campaign (1592–93), leading 6000 men.
Later he participated in the Osaka Castle campaigns.
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