What is up with the pattern on the fence?
Japanese boards read instead IICHIKO KAWAKITA and are not sure either, but the only trail they got that quotes both words is Kawakita Hideya (河北秀也), an art director out of the Tokyo University of Arts known for making beautiful art designs for a design company called "iichiko".

Another source: http://www.logsoku.com/r/2ch.net/anime/1254234423/