was a Japan

Japan

Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

ese Sengoku period

Sengoku period

The or Warring States period in Japanese history was a time of social upheaval, political intrigue, and nearly constant military conflict that lasted roughly from the middle of the 15th century to the beginning of the 17th century. The name "Sengoku" was adopted by Japanese historians in reference...

 samurai

Samurai

is the term for the military nobility of pre-industrial Japan. According to translator William Scott Wilson: "In Chinese, the character 侍 was originally a verb meaning to wait upon or accompany a person in the upper ranks of society, and this is also true of the original term in Japanese, saburau...

. He first served under the daimyo

Daimyo

is a generic term referring to the powerful territorial lords in pre-modern Japan who ruled most of the country from their vast, hereditary land holdings...

 Takeda Nobutora

Takeda Nobutora

was a Japanese daimyo who controlled the Province of Kai, and fought in a number of battles of the Sengoku period. He was the father of the famous Takeda Shingen, who was originally named Harunobu, along with two other sons, Nobushige and Nobukado.Nobutora fought Hiraga Genshin at the Battle of...

, but later on served under Takeda Shingen

Takeda Shingen

, of Kai Province, was a preeminent daimyo in feudal Japan with exceptional military prestige in the late stage of the Sengoku period.-Name:Shingen was called "Tarō" or "Katsuchiyo" during his childhood...

, Nobutora's son. Mitsuyori was a native of the Mino Province

Mino Province

, one of the old provinces of Japan, encompassed part of modern-day Gifu Prefecture. It was sometimes called . Mino Province bordered Echizen, Hida, Ise, Mikawa, Ōmi, Owari, and Shinano Provinces....

.

It is known that Mitsuyori fought in over 29 battles under Shingen, some of them being Sezawa

Battle of Sezawa

The battle of Sezawa was one of many battles fought by Takeda Shingen in his bid to take control of Shinano Province. Here he was opposed by the combined forces of Ogasawara Nagatoki, Suwa Yorishige, Murakami Yoshikiyo, Kiso Yoshiyasu, and Tozawa Yorichika. They gathered a force of 12000 Shinano...

 of (1542) and Uehara

Siege of Uehara

The siege of Uehara was the first of many steps taken by Takeda Shingen in his bid to seize control of Shinano Province. Uehara Castle had been controlled by Suwa Yorishige before it was taken by Shingen.-References:...

 of (1542). It is known that at night warfare, Mitsuyori was very skilled. In which he put to good use at Sezawa. In the year of 1563, Mitsuyori died of illness.