was a Japanese ''

daimyō were powerful Japanese magnates, feudal lords who, from the 10th century to the early Meiji era, Meiji period in the middle 19th century, ruled most of Japan from their vast, hereditary land holdings. They were subordinate to the shogun and n ...

'' of the

Edo period The or is the period between 1603 and 1867 in the history of Japan, when Japan was under the rule of the Tokugawa shogunate and the country's 300 regional '' daimyo''. Emerging from the chaos of the Sengoku period, the Edo period was characteriz ...

, who ruled the Uruido,

Koga KOGA is a Dutch bicycle manufacturer based in Heerenveen, Friesland. The company is known for its long time partnership with Japanese frame manufacturer Miyata, producing bicycles and sponsoring racing teams under the brand name Koga Miyata. As ...

and

Yodo Domain The was a Japanese domain of the Edo period, and the only domain located in Yamashiro Province. Its castle was located within modern-day Fushimi, Kyoto. The strategic location of the castle figured in the 1582 Battle of Yamazaki. During the 1 ...

s. The eldest son of

Nagai Naokatsu was a Japanese ''daimyō'' of the Azuchi–Momoyama period to early Edo period. He was a retainer of Tokugawa Ieyasu, first serving under Ieyasu's son Nobuyasu. After Nobuyasu's execution, Naokatsu left Tokugawa service, but later returned, serv ...

, he fought at the

Battle of Sekigahara The Battle of Sekigahara (Shinjitai: ; Kyūjitai: , Hepburn romanization: ''Sekigahara no Tatakai'') was a decisive battle on October 21, 1600 (Keichō 5, 15th day of the 9th month) in what is now Gifu prefecture, Japan, at the end of ...

and the

siege of Osaka The was a series of battles undertaken by the Japanese Tokugawa shogunate against the Toyotomi clan, and ending in that clan's destruction. Divided into two stages (winter campaign and summer campaign), and lasting from 1614 to 1615, the siege ...

. During the

Shimabara Rebellion The , also known as the or , was an uprising that occurred in the Shimabara Domain of the Tokugawa Shogunate in Japan from 17 December 1637 to 15 April 1638. Matsukura Katsuie, the ''daimyō'' of the Shimabara Domain, enforced unpopular polic ...

he was assigned to defend

Kyoto Kyoto (; Japanese: , ''Kyōto'' ), officially , is the capital city of Kyoto Prefecture in Japan. Located in the Kansai region on the island of Honshu, Kyoto forms a part of the Keihanshin metropolitan area along with Osaka and Kobe. , the ci ...

. Naomasa held and the title of '' Shinano no Kami''. He retired in early 1658 and became a monk, taking the name Shinsai.

References

Yodo domain on "Edo 300 HTML"
(11 December 2007)

(11 December 2007) , - , - Japanese Buddhist clergy Daimyo 1587 births 1668 deaths {{daimyo-stub