I have seen a few people now ask about using MySQL's FULLTEXT indexing with asian languages such as Chinese, Japanese and Korean (herein referred to as CJK.), however, there doesn't seem to be a good centralised article that covers it.
The information is out there, I just don't think it has been well presented yet.
As I have recently done a bunch of research on this topic for a customer, I figured it might be a good opportunity to make my debut in the MySQL blogosphere.
So here we go...
I'll open by saying that attempting to use FULLTEXT with CJK text in MySQL 5.0 will be unsuccessful.
From the CJK FAQ in the MySQL manual:
"For FULLTEXT searches, we need to know where words begin and end. With Western languages, this is rarely a problem because most (if not all) of these use an easy-to-identify word boundary