Support electricity now,
look to the future of electricity
News
- 2026 01.14 Annual Report FY 2025
- 2026 01.14 Report on the Quality of Electricity Supply-Data for FY 2024
- 2025 11.10 Outlook for Electricity Supply-Demand and Cross-regional Interconnection Lines FY 2024
- 2025 09.04 Articles of Incorporation, etc.
- 2025 06.30 Aggregation of Electricity Supply Plans for FY 2025
Our Fact
Member
2,216 companies*
(as of April 2026)
- General Transmission and Distribution Company(TSO) : 10
- Transmission Company: 3
- Specified Transmission and Distribution Companies: 51
- Retail Companies: 808
- Specified Transmission, Distribution and Retail Companies: 39
- Generation Companies: 1,416
- Specified Wholesale Suppliers: 142
* Total member is not simple addition of above stated companies due to licensing.
Peak Demand
15,927×104 kW
forecasted for Nationwide
(Average Value of the Three Highest Daily Loads in August 2026, at the sending-end)
Source: Aggregation of Electricity Supply Plans for Fiscal Year 2026
Procured Supply Capacity
18,892×104 kW
As of publishing contract result of incremental auction of the capacity market (physical delivery for FY 2026)
[breakdown]
Procured in the market：16,568×104kW
Expected capacity of FIT generators：2,324×104kW
Key roles of the OCCTO
Supply-demand adjustment/Grid operation
We achieve a stable supply of electricity by monitoring the supply-demand situations and operational status of grids across the nation and by giving instructions to the relevant companies when the supply-demand balance gets worse. In addition, we study and design the supply-demand balancing market and other schemes in detail in order to procure and operate the balancing capacity more efficiently.
Conversion to the next-generation electric power network
We take the lead in the promotion of fair, impartial, and effective use of power transmission and distribution facilities and in the development and renovation of cross-regional interconnected grids in order to contribute to the efforts to make renewable energy a primary energy source and to reinforce the resilience of electric power systems.
Securing of supply capacity for a stable supply
In order to establish a system to secure and use the supply capacity necessary for a stable supply for the medium-to-long term at the lowest possible cost, we study, design in detail, and operate the market schemes and systems to trade the values of power sources.