Korean claims that is is unproper and no global standard Sea name which use Country name. But Korean claim is filled up with distorture and selfish, and ethno-centristic theories. So Korean claim is nonsense.
for example, Korean use those names,
Strait of Korea (Between Korea and Japan)
West Korean Gulf (between North Korea and China)
East Koran Gulf(Tongjeoseonman/Broughton Bay)
they also claims that they reverts "Sea of Korea" instead of Sea of Japan. what a double standard???
Ofcourse is nothing problem that the Country-name Sea name. Lets open your atlas book during the junior high school?
Check this;
Philippine Ocean (Between Pilippines, Taiwan, and Japan and Palau and so on)
Indian Ocean (Between India, Madagascar, and Indonesia and so on)
East China Sea (Between China and Japan)
South China Sea (Between China ,Vietnam, and Philippines)
Irish Sea
English Channel
Gulf of Bothnia
Denmark Strait
Channel of Mozambique (Between Mozambique and Madagascar)
Singapore Strait
Gulf of Papua
Great Australia Gulf
Gulf of Honduras
Golfo de Venezuela
Jamaica Channel
Gulf of Oman
Gulf of Iran (persian gulf)
Gulf of Guinea
Gulf of Thailand
Timor Sea
Norway Sea (Between Norway and Iceland)
Gulf of Panama
Gulf of Finland
Marta Channel
Gulf of Mexico (Between US and Mexico and Cuba)
Gulf of Oman
Strait of Korea (Between Korea and Japan)
West Korean Gulf (between North Korea and China)
East Koran Gulf(Tongjeoseonman/Broughton Bay)
アラビア湾（ペルシア湾）
グリーンランド海
バハマ海