Google Ranking Questions by Country

My website was located on page 1 in Korea IP
Then one day, the rankings fell sharply.
It's still on page 1 in Japanese IP, what's the reason?

The reason I am asking this question is because I want to increase the ranking in Korea, but there are websites that keep good rankings only in IPs of other countries.

Do you have 2 versions of your website for both languages?

shuttershades said:

Do you have 2 versions of your website for both languages?

Click to expand...

Nope, my website is only Korean

Then you should make /jp/ version and maybe you will rank in Japan too.