Project planners originally intended the monorail line to extend from Haneda Airport to Shimbashi or Tokyo Station, and the license that had been acquired allowed building it up to either station. However, opposition from residents living near the Shibaura Canal, which had been part of the proposed route, as well as cost overruns during the construction of the Tōkaidō Shinkansen, which drained government subsidies, resulted in a shortened route from the airport to Hamamatsuchō Station. To further minimize costs, the line was routed over other public waterways donated by local municipalities, which eliminated the need to acquire expensive private land, but reclaimed parts of Tokyo Bay, as well as rivers and canals. The resulting alignment removed a number of fishing and aquatic farming operations, and local fishing cooperatives had their licences revoked by the Tokyo Metropolitan Government. Among them was a seaweed harvesting field in Ōta Ward that had produced a premium brand of nori since the Edo period called "Omori no nori".