1883.Observations upon the KOREAN Coast,Japanese-Korean Ports and Siberia.

Observations upon the Korean Coast ,Japanese -Korean Ports and Siberia made during a journey from the Asiatic Station to the United States through Siberia and Europe ,june 3 to September 8,1882(1883년 초판)
By:(U.S) Office of naval Intelligence Bureau of Navigation

http://www.book1950.co.kr/main.html?menu=view&uid=37&category=Maritime%20Affairs

Attached map; Sea of Japan



*Aye, this map made on 1882, 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 big lies