Mr. Tenuki
As of May 5, 2008, "Mr. Tenuki" is a 2k player on KGS. As you can see from the rank graph below, there was a big jump in October 2007-- this was due to his relative inactivity between June and October 2007. (In fact, his playing strength weakened by about 1.5 stones during that time period and did not recover until later.)
In case you're wondering... no, "Tenuki" is obviously not his real last name. (For that matter, although he is indeed of East Asian descent, he is not even Japanese.)
If you're looking for this user, we're sorry to tell you that it's not possible to reach him right now, because he has just played an off-server tenuki. Please come back later for updates on his status.