All appeals are dismissed.

The costs of appeal are assessed against the plaintiffs.

The grounds of appeal are examined.

For the reasons indicated in its holding, the lower court rejected all of the Plaintiffs’ claims seeking restitution of unjust enrichment against the difference between the fixed electricity rate and the previously paid electricity rate based on the method asserted by the Plaintiffs, deeming that the Defendant could not be deemed to have received considerable excessive amounts from the Plaintiffs compared to the quantity of use, etc. based on the unfair calculation method.

The judgment below

Examining the reasoning in light of the relevant legal principles and records, the lower court did not err in its judgment by misapprehending the relevant legal principles or failing to exhaust all necessary deliberations as to the difference in the basic charges, electric power rates, reverse rates, electric power funds, value-added taxes, and electric utility rates before and after the establishment of the separation power system of mother and child, and whether the Defendant’s unjust enrichment, etc., as shown in the grounds of appeal, by misapprehending the legal doctrine or omitting judgment

Therefore, all appeals are dismissed, and the costs of appeal are assessed against the losing party. It is so decided as per Disposition by the assent of all participating Justices on the bench.