, also known as Naganori, was Japanese samurai of the

Sengoku period The was a period in History of Japan, Japanese history of near-constant civil war and social upheaval from 1467 to 1615. The Sengoku period was initiated by the Ōnin War in 1467 which collapsed the Feudalism, feudal system of Japan under the ...

, in the service of the Imagawa clan. The second son of Okabe Chikatsuna, he became a senior retainer of the Imagawa, following in his father's footsteps.Sengoku Biographical Dictionary
/ref> In 1560, After his lord

Imagawa Yoshimoto was a pre-eminent ''daimyō'' (feudal lord) in the Sengoku period Japan. Based in Suruga Province, he was known as . he was one of the three ''daimyōs'' that dominated the Tōkaidō region. He died in 1560 while marching to Kyoto to become ...

was killed at the

Battle of Okehazama The took place in June 1560 in Owari Province, located in today's Aichi Prefecture. In this battle, the heavily outnumbered Oda clan troops commanded by Oda Nobunaga defeated Imagawa Yoshimoto and established himself as one of the front-running ...

, he kept fighting and even retrieved his lord's corpse. Following the clan's collapse he switched allegiance to the

Takeda clan The was a Japanese samurai clan active from the late Heian period until the late 16th century. The clan was historically based in Kai Province in present-day Yamanashi Prefecture. The clan reached its greatest influence under the rule of Taked ...

and defended

Takatenjin Castle was a Sengoku period ''yamashiro''-style Japanese castle located in the Kamihijikata and Shimohijikata neighborhoods of the city of Kakegawa, Shizuoka prefecture. The ruins have been protected as a National Historic Site since 1975, with the area ...

. In 1581, He died in the Siege of Takatenjin when he was attacked by Tokugawa forces.

References

1581 deaths Samurai Year of birth unknown {{Japan-hist-stub