In addition, due to repeated fare hikes corresponding to the deterioration of JNR's finance and the frequent occurrences of strikes because of labor troubles, the number of passengers on existing Shinkansen lines tended to decline.
さらに国鉄財政の悪化に伴う運賃・料金値上げの繰り返し、労働紛争によるストライキの頻発化などから、既存新幹線の乗客が減少傾向に陥った。