Okitsu-shi

Japanese: 興津氏 - おきつうじ

...The Tokaido is a difficult place with the Okitsu River and Satta Pass to the east and Mount Seigenji approaching Suruga Bay to the west. The Kiyomi Barrier was built at the foot of Mount Seigenji as a safeguard against the passage to Bando. From the Kamakura period onwards, the Okitsu clan, a branch of the Irie clan, ruled as the head of the inn, and from the Muromachi period onwards, the Okitsu clan, who became vassals of the Imagawa clan, built their residence here, and during the Sengoku period, they set up a guard station on Mount Satta. In 1601 (Keicho 6), it was designated as a post station on the Tokaido, and thereafter developed as a post town. ...

From Mr. Ikutsu

…Also written as Okitsu. The Kudo clan of the Southern Fujiwara clan. Originated from Okitsu, Tsurugahara County, Suruga Province (present Okitsu Town, Shimizu City, Shizuoka Prefecture). It is said that the clan began when Chikazuna, the son of Okabe Gonnokami Kiyotsuna, called himself Okitsu Rokuro, but this is not certain. Many members of the Kudo clan made their name as warriors from the end of the Heian period, and the Okitsu clan also has a name in the Hogen Monogatari as a servant of Minamoto no Yoritomo, as Okitsu Shiro. After that, they became vassals of the Kamakura vassals, and during the Jokyu War, Okutsu Saemon-no-jo joined the Kamakura forces and went to Kyoto (Jokyu-ki). From the Muromachi to Sengoku periods, they became vassals of the Imagawa clan, and since Okitsu was a key transportation point, they set up a checkpoint to collect tolls, which became an important economic base. …

*Some of the terminology that refers to the "Okitsu clan" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…東は興津川･薩埵（さつた）峠，西は清見寺山が駿河湾に迫る東海道の難所，清見寺山下には清見関が設けられ，坂東への備えとした。鎌倉時代以降は入江氏支流の興津氏が宿の長者として支配，室町時代以降今川氏の被官となった興津氏はこの地に居館を構え，戦国期には薩埵山に警護関を置いた。1601年(慶長6)東海道の宿駅に指定され，以後宿場町として発展。…

【息津氏】より

…興津とも書く。藤原南家工藤氏族。駿河国廬原郡息津(現，静岡県清水市興津町)より起こる。岡部権守清綱の子近綱が息津六郎を称したのに始まるというが定かではない。工藤氏族は平安末期より武士として名をあげた者が少なくないが，息津氏もすでに《保元物語》に源頼朝の従者として息津四郎の名を残している。以後鎌倉御家人に列し承久の乱の際には鎌倉方軍勢に加わって奥津左衛門尉が上洛したという(《承久記》)。室町～戦国期には今川氏の被官となり，興津という地が交通の要衝にあったことから，関所を設けて関銭を徴収，これを重要な経済的基盤のひとつとした。…

※「興津氏」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典第２版について | 情報

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