Isogo Airfield

The 'airfield' is not officially documented and is considered a phantom airport. The location was reclaimed from Negishi Bay in the late 1950s and 1960s specifically for the development of a heavy industrial zone. The land was immediately used for constructing power plants and refineries, leaving no physical space or operational window for a permanent airfield.

The site at coordinates 35.41163, 139.62721 is a densely developed heavy industrial complex in Isogo Ward, Yokohama. The area is occupied by critical infrastructure, including the JERA Minami-Yokohama Thermal Power Station, the Tokyo Gas Negishi LNG Terminal, and the ENEOS Negishi Refinery. There are no physical remnants or evidence of an airfield or runway.

The entity 'Isogo Airfield' has no documented historical significance as it does not appear to have existed as a formal airport. The non-standard ICAO code 'JP-1818' is not assigned by the International Civil Aviation Organization. The true historical significance of the location is its role in Japan's post-war economic boom, being a major center for energy and petrochemicals built on reclaimed land.

Zero. The site is fully occupied by essential and large-scale industrial and energy infrastructure. There are no plans, prospects, or physical possibility of developing an airfield at this location.