Hokkaido Electric Power will raise both its regulated and market-rate electricity tariffs from November 1, 2026, passing through a higher grid-usage toll set by Hokkaido Electric Network, the general transmission and distribution utility that operates in the region. The utility filed the change to its specified retail supply terms with Japan's economy ministry on September 25, and the same increase will apply, from November 1, to low-voltage liberalized plans and to high-voltage and extra-high-voltage business tariffs.
The trigger is the toll retailers pay to use the transmission lines, substations and distribution lines that carry power to customers. Hokkaido Electric Network, the operator that runs that grid, is revising its wheeling fee from November 1 to reflect higher prices and interest rates; that fee is set under an economy ministry approval of the network operator's projected revenue.
For a household on the utility's standard lighting plan, a 30A contract using 230kWh a month, the monthly bill rises from ¥11,115 to ¥11,596, an increase of ¥481, or 4.3%. That figure includes consumption tax and the renewable energy levy applied from May 2026 to April 2027 (¥4.18 per kWh), but excludes the separate fuel-cost adjustment charge that moves month to month. The company says actual bills will vary with usage and those two floating charges, and it has posted an online calculator so customers can check their own exposure.
Business customers on higher-voltage tariffs see comparable percentage moves in their basic charges.
| Tariff class | Unit | Before | After |
|---|---|---|---|
| Lighting B (30A contract) | per contract | ¥1,254.00 | ¥1,716.30 |
| Low-voltage power | per kW | ¥1,413.06 | ¥1,681.02 |
| High-voltage business power | per kW | ¥2,693.20 | ¥2,970.10 |
| High-voltage electric power | per kW | ¥2,880.20 | ¥3,157.10 |
| Extra-high-voltage business power A (60kV) | per kW | ¥2,619.50 | ¥2,742.40 |
Per-kWh energy charges also rise across the tariff classes listed in the notice, typically by less than a yen: the lighting-B rate for the first 120kWh, for instance, moves from ¥35.69 to ¥35.77.
Alongside the price change, Hokkaido Electric is revising three supply-condition clauses. Where a faulty meter prevents accurate measurement of usage, the company will now agree the disputed figure directly with the network operator rather than negotiating it with the customer, though it says the underlying calculation method is unchanged. It is making the same change to how it agrees a customer's power factor when asking them to disconnect a phase-advancing capacitor. For supply suspension or contract termination, the company will now treat a warning notice sent by registered mail as given two days after dispatch if a customer refuses it without good reason.
The company disclosed a separate revision to its full-year earnings forecast the same day; that filing is a distinct disclosure and its figures are not part of this tariff notice.