Keith Jarrett will play a solo concert at the Sejong Center in Seoul on June 2, 2011. The concert is already listed on ecmrecords.com. I don’t know when tickets will go on sale. Let me know if you have any information.
Thanks to TJ for the information!
Update (February 16, 2011). Tickets should go on sale on April 1, 2011 through Ticketpark.
Update (April 5, 2011). As mentioned in the forum, tickets are available, but not on the English version of the Ticketpark website, only on the Korean version. You can buy tickets by phone. Apparently, at some point, you can dial 9 to speak to an English-speaking employee, but I haven’t tried that personally.