also known as Usami Sadayuki (宇佐美定行) (1489 – August 11, 1564) was a Japanese

samurai The samurai () were members of the warrior class in Japan. They were originally provincial warriors who came from wealthy landowning families who could afford to train their men to be mounted archers. In the 8th century AD, the imperial court d ...

of the

Sengoku period The was the period in History of Japan, Japanese history in which civil wars and social upheavals took place almost continuously in the 15th and 16th centuries. The Kyōtoku incident (1454), Ōnin War (1467), or (1493) are generally chosen as th ...

, who served the

Uesugi clan The is a Japanese samurai clan which was at its peak one of the most powerful during the Muromachi period, Muromachi and Sengoku periods (14th to 17th centuries).Georges Appert, Appert, Georges. (1888) ''Ancien Japon,'' p. 79./ref> At its heigh ...

Echigo Province was an old provinces of Japan, old province in north-central Japan, on the shores of the Sea of Japan. It bordered on Uzen Province, Uzen, Iwashiro Province, Iwashiro, Kōzuke Province, Kōzuke, Shinano Province, Shinano, and Etchū Province, ...

. He was the son of Usami Takatada. Usami Sadamitu

Also known as Yoshikatsu, Sadayuki was one of Uesugi Kenshin's chief retainers. He was placed in charge of the messengers during the 4th

Battle of Kawanakajima The were a series of battles fought in the Sengoku period of Japan between Takeda Shingen of Kai Province and Uesugi Kenshin of Echigo Province from 1553 to 1564. Shingen and Kenshin contested each other for control of the plain of Kawanakaj ...

. In 1564

Nagao Masakage was the head of the Ueda Nagao clan following the Sengoku period The was the period in History of Japan, Japanese history in which civil wars and social upheavals took place almost continuously in the 15th and 16th centuries. The Kyōtoku i ...

made disparaging and insulting remarks about Kenshin (who was also the brother of his wife) and Kenshin thus ordered that he be put to death. Sadayuki invited Yoshikage to go boating on

Lake Nojiri is in the town of Shinano, Kamiminochi District, Nagano Prefecture, Japan. Second to Lake Suwa among lakes in Nagano Prefecture, Nojiri is a resort, the location of the first pumped-storage hydroelectricity in Japan, and the site of a Japanes ...

and then abruptly threw him overboard. After Kenshin's death, Yoshikage's son and successor

Nagao Kagekatsu was a Japanese samurai clan. Papinot, Jacques Edmond Joseph. (1906). ''Dictionnaire d’histoire et de géographie du Japon''; Papinot, (2003)"Nagao," ''Nobiliare du Japon'', p. 39 retrieved 2013-5-5. History The Nagao clan descend from ...

, swore vengeance against Sadayuki's own son

Usami Katsuyuki Usami (written: 宇佐美 or 宇佐見) is a Japanese surname. Notable people with the surname include: *, Japanese long-distance runner *, Japanese volleyball player *, Japanese mixed martial artist *, Japanese footballer *, Japanese rugby union p ...

. As a result, Katsuyuki left the service of the Uesugi clan and joined the army of

Toyotomi Hideyoshi , otherwise known as and , was a Japanese samurai and ''daimyō'' (feudal lord) of the late Sengoku period, Sengoku and Azuchi-Momoyama periods and regarded as the second "Great Unifier" of Japan.Richard Holmes, The World Atlas of Warfare: ...

References

Samurai 1489 births 1564 deaths Uesugi retainers Deaths by drowning {{samurai-stub