Shikoku Electric Power's grid subsidiary, Shikoku Electric Power Transmission & Distribution, filed a revised wheeling-supply tariff with the industry minister on September 11, raising the per-kilowatt-hour charges that retailers and generators pay to use its network. The new rates take effect November 1.
Every voltage band goes up. Low-voltage wheeling, the charge most closely tied to household and small-business supply, rises from ¥9.22 to ¥10.74 per kWh, ex-tax. High-voltage climbs from ¥4.20 to ¥4.76, extra-high-voltage from ¥1.97 to ¥2.10, and the generation-side charge from ¥0.46 to ¥0.54.
| Voltage class | Current rate | Revised rate | Change |
|---|---|---|---|
| Low voltage | ¥9.22 | ¥10.74 | +¥1.52 |
| High voltage | ¥4.20 | ¥4.76 | +¥0.56 |
| Extra-high voltage | ¥1.97 | ¥2.10 | +¥0.13 |
| Generation side | ¥0.46 | ¥0.54 | +¥0.08 |
The increase follows a revenue outlook the Ministry of Economy, Trade and Industry approved on September 4, plus a true-up correcting the gap between Shikoku's actual and forecast wheeling revenue in the two years to March 2025. The utility expects the changes to add ¥37.8bn in revenue over the two years to March 2028 from higher costs, wages and interest rates, offset by a ¥4.0bn clawback tied to that earlier forecasting gap, for a net increase of ¥33.8bn, or ¥23.9bn a year.
Shikoku Electric said its consolidated results should move in step with that revenue gain. It has not yet set the policy for passing the wheeling increase into retail electricity prices, and it says it will promptly assess the concrete earnings impact once that decision is made. Until then, the ¥33.8bn figure describes grid-fee revenue, not incremental profit, and the retail pass-through question is the part of this filing still unresolved.