Metropolitan Outer Floodway Management Office
TOKYO, JAPAN - JUNE 20: Yasuyuki Osa, a Subsection Manager sits in front of CCTV screens showing different areas of the facility in the control room of The Tokyo Metropolitan Area Outer Underground Discharge Channel facility in Kasukabe City, Saitama Prefecture, Japan, on Wednesday, June. 20, 2018. The facility, designed to drain flood waters from the surrounding areas after heavy storms or typhoons is used on average seven times a year and has also become a tourist attraction with the facility running guided tours three times a day allowing tourists to visit the massive underground water tank. (Photo: Richard Atrero de Guzman/ Aflo )