, usually known as Shibata Nagaatsu (died 1580), was a military commander who served under the warlord Uesugi Kenshin

Uesugi Kenshin

was a daimyo who ruled Echigo province in the Sengoku period of Japan.He was one of the most powerful lords of the Sengoku period. While chiefly remembered for his prowess on the battlefield, Kenshin is also regarded as an extremely skillful administrator who fostered the growth of local industries...

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The son of Shibata Tsunasada and the elder brother of Shibata Shigeie, Naganori served under Kenshin from the latter's earliest campaigns. During the Ōtate no Ran, the succession struggle that followed Kenshin's death, Naganori supported Kenshin's son Kagekatsu

Uesugi Kagekatsu

was a daimyo during the Sengoku and Edo periods of Japanese history. The son of Nagao Masakage and husband of Uesugi Kenshin's elder sister, Aya-Gozen. After his father died, he was adopted by Kenshin....

. Naganori died of illness in 1580.