Concerning the construction of the railways, many of the tunnels having been excavated for the 'Bullet train plan' and much of the land having been purchased at the time were used effectively, as described above.
その建設に関しては前述の通り、戦前の「弾丸列車計画」の際に開削されたトンネルや、買収された用地の多くが活用された。