If you are open to a very spiritual Korean tea experience go to the web site TeaTourKorea.com. The tour is non profit and will introduce members to both Korean tea and tea ware.
Welcome to the board Mr. Park and congratulations on a beautiful body of work and hope to hear more from you, your experiences and wisdom. It looks to be a lovely trip you're putting together and would like to join you but alas the budget of a potter is a problem...... Do you bring Korean potters here on exchanges ever and are you doing any Pun-Cheong (sp?) style work? If so I'd love to see some as it is some of my most favorite of all Korean work. I went to a workshop of Yoon Kwang-Cho a few years ago which was fascinating.
Korea has indeed left an indelible mark on Japanese pottery and chanoyu from the introduction of the climbing kiln to pun-choeng ware (kohiki in Japanese) to raku and the wabi-sabi aesthetic you mention, and finally the wares of Karatsu with their elegant shapes and rim treatments as well as that of Hagi which is so popular with many tea folks on this board.
Very best wishes,