1817.1820.H.M.S Alceste 's expedition around Corean Coast.

Voyage of His Majesty's Ship Alceste, to China, Corea, and the Island of Lewchew: (1820)Author: John M'Leod
Publisher: John Murray
http://www.archive.org/details/voyagehismajest00mlegoog
http://www.archive.org/stream/voyagehismajest00mlegoog#page/n79/mode/1up/search/japan

This country, which is also called Chau-tsien by the Chinese, and Solho by the Mantchew Tartars, is, by the most authentic reports, separeted on the north and north-west from the Tartar provinces by a chain of mountains, and at one part from Lea-tung by a barrier of palisades; it is bounded on the west by the Yellow Sea, and on the east by the sea of Japan; the straits of Corea, about 86 miles wide, dividing it on the south-east from the latter country.


Narrative of a voyage in His Majesty's late ship Alceste, to the Yellow Sea, along the coast of Corea, and through its numerous hitherto undiscovered islands, to the island of Lewchew : with an account of her shipwreck in the straits of Gaspar.(1817)
http://www.archive.org/details/narrativeofvoyag00mleoiala

East China Sea=Tunghai, Eastern Sea
On the 13th July the squadron (four ships and the brig) sailed; and, coasting along the provnces of Quang-tung and Pokien, passed through the Strait of Formosa, and entered the Tung Hai, or Eastern Sea.


 Chart Shewing the Track & Discoveries of His Majesty's Ships Alceste & Lyra, in the Eastern & Yellow Seas, with the adjacent parts from the best authorities.
Japanese Sea 
Strait of Core
Tung-Hai-Eastern Sea
http://hdl.huntington.org/cdm/singleitem/collection/p15150coll4/id/2676/rec/3



*Aye, this book published on 1820, it is earlier than Japan annexed Korea on 1910. So Korean claim which "the name of Sea of Japan established under the colonial rule of Korea", is distorture. Japan and Korea deveides their name, one is Sea of Japan ,the oher is Strait of Korea (and East Korean gulf-Broughton bay)