2011 Japanese Cosplayers Comiket Expo Part 01
"Comiket (コミケット Komiketto?), otherwise known as the Comic Market (コミックマーケット Komikku Māketto?), is the world's largest dōjinshi fair, held twice a year in Tokyo, Japan.[1] The first Comiket was held on December 21, 1975, with only about 32 participating circles and an estimated 600 attendees.[2] Attendance has since swelled to over a half million people.[1]"
-Wikipedia
https://en.wikipedia.org/wiki/Comiket
