But I am sorry to say that 'Sea of Japan' which is written between Korea and Japan on the map should be changed to 'East Sea'.
It is because writing in 'East Sea' was already accepted throughout the history from many centuries ago.
In addition, 'East Sea' is actually Korean territory than Japan's because this was also accepted by the evidences found in the past.
To help your understanding about this issue, I have attached a link (http://www.koreaaward.com/kor/5330).