Wikimedia Bugzilla is closed!

I am trying to convert the japanese wikipedia's xml dump to sql file with mwdumper and "jawiki-latest-pages-meta-history.xml",
But I get a Java exception, and it doesn't work...

the message is that:
-----------------
Exception in thread "main" java.io.IOException: java.sql.SQLException: Incorrect
 string value: '\xF0\xA1\x9A\xB4' for column 'rev_user_text' at row 5014
-----------------


the status of mysql on my PC is like a following:
--------------
mysql  Ver 14.14 Distrib 5.1.50, for Win32 (ia32)

Connection id:          4
Current database:       wikidb
Current user:           root@localhost
SSL:                    Not in use
Using delimiter:        ;
Server version:         5.1.50-community MySQL Community Server (GPL)
Protocol version:       10
Connection:             localhost via TCP/IP
Server characterset:    utf8
Db     characterset:    utf8
Client characterset:    utf8
Conn.  characterset:    utf8
TCP port:               3306
Uptime:                 52 min 20 sec

Threads: 1  Questions: 1594  Slow queries: 1  Opens: 379  Flush tables: 1  Open
tables: 3  Queries per second avg: 0.507
--------------



I don't understand very much about MySQL or Java, so it can be a simple problem.
But I could not solve this by myself.
So, please tell me what happens and how to solve.