One of the the fun things in the National High School Manga Championship of Japan, aka Manga Koshien, is manga graffiti on the booth walls drawn by the high school kids. The kids are actually allowed and encouraged to draw graffiti on the white walls in their spare time. In contrast to the competition which they can draw only original characters and stories, basically they can draw anything they want on the walls. That is the Manga Koshien's famous tradition. Check the graffiti and find your favorite!
*all of the photos were taken by Mikikazu Komatsu with the organizer's permission