The first major contract announced was for a tunnel in Yamanashi and Shizuoka prefectures expected to be completed in 2025. Construction of a tunnel under the southern Japanese Alps commenced on 20 December 2015, approximately below the surface at its deepest point. The tunnel is expected to be completed in 2025, and upon completion will succeed the deep Daishimizu Tunnel on the Joetsu Shinkansen line as the deepest tunnel in Japan. Construction has also started on the maglev station at Shinagawa. Being built below the existing Shinkansen station, and to consist of two platforms and four tracks, construction is planned to take 10 years, largely to avoid disruption to the existing Tokaido Shinkansen services located above the new station.