Linked from
The 8 pages that link to Japanese National Railways, each with the reason it gives.
Tōkaidō ShinkansenRelated: It built and operated the line from its 1964 opening.
Seikan TunnelRelated: The company investigated and built the tunnel before its 1988 opening.
Sanyō ShinkansenRelated: It planned and built the Sanyō Shinkansen before the railway privatization.
Tōhoku ShinkansenRelated: It planned and began construction of the Tōhoku Shinkansen.