Is it a great finding? A mysterious ranking in Alexa

I've checked every "top-site by country" in Alexa.
Yes, my favorite Kakaku.com is at 24 th, just 3 ranks behind giant Facebook in Japan.
It is interesting because the rankings are almost reasonable.... except a particular country.

That is South Korea. In top 10 ranking, there are 3 Chinese company; Baidu, QQ and Taobao.
I asked my Korean classmate whether it is correct. He said it's impossible because general Korean public people don' t read Chinese language at all.
http://www.alexa.com/topsites/countries/KR
The population of South Korea is 48million, and it is believed 1 million Chinese people are living in Korea. If the data was correct, the cyber space in Korea has been trespassed by someone else...