Overview: At the end of October, 20,000 people of all ages and nationalities descend on the main intersection of Tokyo's Roppongi district to join in the Halloween festivities. Their costumes run the full gamut, from U.S. presidents to iconic Japanese anime characters. The revelers include young men who wear masks to pluck up the courage to chat up women, and a barber who grew his hair for a year as part of his costume. These Halloween activities grew naturally over a decade ago in Roppongi, an area popular also with expats. We spent 3 days uncovering the stories of the people behind the masks.