Tadahiro Uesugi is a Japanese Illustrator living in Tokyo. He was introduced to Mike Cachuela, who in turn introduced him to Henry Selick. Henry's directions for the art was "Design with your own ideas; but we would like to see something we've never seen before!"
His most iconic design is the "Pink Palace" the apartment complex in the movie and home to all of the characters.
 The Incredible Illustrations of Tadahiro Uesugi
Tadahiro Uesugi talks 'Coraline' Design