While using your website for school assignment, I have found a minor, or maybe a major mistake.
The sea between Korea and Japan is written to be 'Sea of Japan', but it is actually 'East Sea'.
It means that it is the sea east to Asia.
The name has been used for a long time, but during World War ¥±, when Japan ruled over Korea, Japan changed it.
Hope to see your wonderful website with the right name.