Davydov, GI (English spelling)

...The following year, the Kuril Islands, along with Eastern Ezochi, became direct territories of the Shogunate, and in 1800, Takadaya Kahei was ordered to open fishing grounds on Etorofu Island, and the village system was implemented on the island, promoting the assimilation of the Ainu. The area was again under the control of the Matsumae Domain in 1821 (Bunsei 4), but during this time, there were frequent conflicts with Russia, which was trying to establish trade relations with Japan through the Kuril Islands, such as the attack on Etorofu by Nikolai Khvostov and Gavriil I. Davydov in 1807 (Bunka 4), the capture of Golovnin, who had come to survey the Kuril Islands waters in 1811, and the abduction of Takadaya Kahei by Pyotr I. Rikord the following year. The Treaty of Peace and Amity between Japan and Russia concluded on February 7, 1855 (December 21, 1856) established the border between the two countries at the strait between the islands of Etorofu and Uruppu, and the Treaty of Exchange of Sakhalin for the Kuril Islands made all of the Kuril Islands Japanese territory.

*Some of the terminology explanations that mention "Davydov, GI" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…翌99年東蝦夷地とともに千島を幕府直轄領とし，1800年高田屋嘉兵衛に命じて択捉島に漁場を開かせるとともに，同島に郷村制を実施してアイヌの同化策を進めた。　同地は21年(文政4)再度松前藩領となったが，この間，1807年(文化4)フボストフNikolai KhvostovやダビドフGavriil I.Davydovらの択捉島攻撃，11年千島海域の測量に来たゴロブニンの捕縛と翌年のリコルドPyotr I.Rikordによる高田屋嘉兵衛の連行など，千島を介して日本と交易関係を結ぼうとするロシアとの間にしばしば紛争が生じた。55年2月7日(安政1年12月21日)の日露和親条約によって両国の国境は，択捉･ウルップ両島間の水道に定められ，樺太･千島交換条約により千島全島が日本領となった。…

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