When I was searching for some information on your website, I found that something wrong.
On your website, the name of the sea between KOREA and JAPAN is described as "ìíÜâú¡°£¬not¡°东ú¡±.
As far as I know, the sea which is close to more than two countries can't include any name of the country when it's described.
Also, to help your understanding, I've attached a screen shot as reference.
As I'm Korean, I want the name of the sea to be corrected as "东ú¡°.