Earlier this month, cops in Tokyo's Shibuya stopped a person dressed as an anime female (see above). The mask is called an "animegao" (アニメ顔) or "anime face".
According to Japanese publication Tokyo Sports, the police stopped the cosplayer, asking, "Why are you wearing that mask?" The anime faced cosplayer replied, "That, I cannot say." The police, however, had the cosplayer write down his or her name and address.
The perplexing scene was supposedly happened upon by a Tokyo Sports writer, who noted just how odd—and freaky—the whole thing was.
渋谷に現れた謎の"アニメ顔"少女 [Tokyo Sports]