In your article what about introduce Japan (I'll attach the address),
You used a map which had mistake.
In there, 'East sea' be wrote as 'Sea of japan'.
It is wrong orthography.
Please modify that map as 'East sea' or 'East sea/Sea of japan'.
I'll look foward your recise and reply mail.
Thank you.
Sincerely,
Inyoung Heo.