This summer, the usual revelers in Tokyo's Shinjuku Ward encountered a group of apparently out-of-place people who were on a mission to explore the nocturnal life of this multicultural town.

The itinerary of the nightly tours seemed to be mix and match: one night, participants dined at a Korean restaurant after visiting sex shops. On another night, they walked in a park guided by its homeless inhabitants.

However, these tours have one underlying theme -- to increase awareness of people from all walks of life, according to its organizer.