In 2014, a subculture emerged in Japan called jimi Halloween (地味ハロウィン), or "mundane Halloween." It was started by a group of adults at Daily Portal Z who "kind of wanted to participate in the festivities of Halloween, but were too embarrassed to go all out in witch or zombie costumes." So instead of the flashy and flamboyant costumes they had been seeing gain popularity in Japan, they decided to dress up in mundane, everyday costumes.

You'll see costumes like those pictured above:
"Guy who used a face swap app to switch his face with the Starbucks icon"
"Banksy at Sotheby's Auction House shredding his own painting"
"Photographer's Assistant whose job it is to make children stop crying"

They truly have to be seen (and usually explained) to be believed, so head to Spoon & Tamago via the link below to see even more mundane entries.