北総鉄道北総線
Service on this line commenced on July 17, 2010. The line involved the refurbishment of 32.3 km of existing track on the Hokusō Line, as well as the construction of 19.1 km of new dual track to Narita Airport, partly using disused rights-of-way originally planned for the cancelled Narita Shinkansen project. The total cost, according to the Narita Rapid Rail Access website, was estimated to be ¥126 billion, or about US$1.3 billion.