According to IHO(International Hydrographic Organization) and UNCSGN(United Nations Conferences on the Standardization of Geographical Names), in case of topographical feature shared with two or more countries, yet naming differently in their own languages, all of the names in each language should be marked.
Once Korea and Japan agree on a common designation, that is in accord with the general rule of international cartography, we will then follow the agreed-on designation.
Thank you for your time.
Sincerely yours