how to fix or add the ocean name between korea and japan!? reque

i’ve used Grafana Worldmap and found something,
as i know the name of ocean which is located between korea and japan must be written dual name (east sea, sea of japan)

but i can see only one (sea of japan)

the other map in openstreetmap display two things

is there any way to fix in my local enviroment? or where should i request this problem?