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About OCCTO
Message from the President
Role of OCCTO in the Electricity System Reform
Organization Information
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Membership

Articles of Organization, etc

Articles of Organization, etc

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Annual Report

Annual Report
Annual Report FY 2016
Annual Report FY 2019
Annual Report FY 2020
Annual Report FY 2021
Annual Report FY 2022
Annual Report FY 2023
Annual Report FY 2024
Annual Report FY 2025

Electricity Supply Plan

Electricity Supply Plan
Aggregation of Electricity Supply Plans for FY 2016
Aggregation of Electricity Supply Plans for FY 2017
Aggregation of Electricity Supply Plans for FY 2018
Aggregation of Electricity Supply Plans for FY 2019
Aggregation of Electricity Supply Plans for FY 2020
Aggregation of Electricity Supply Plans for FY 2021
Aggregation of Electricity Supply Plans for FY 2022
Aggregation of Electricity Supply Plans for FY 2023
Aggregation of Electricity Supply Plans for FY 2024
Aggregation of Electricity Supply Plans for FY 2025
Aggregation of Electricity Supply Plans for FY2015 and Transmission to Minister of Economy, Trade and Industry
Aggregation of Electricity Supply Plans for FY2016

Outlook of Electricity Supply-Demand and Cross-regional Interconnection Lines

Outlook of Electricity Supply-Demand and Cross-regional Interconnection Lines
Outlook of Electricity Supply-Demand and Cross-regional Interconnection Lines FY 2015
Outlook of Electricity Supply-Demand and Cross-regional Interconnection Lines FY 2016
Outlook of Electricity Supply-Demand and Cross-regional Interconnection Lines FY 2017
Outlook of Electricity Supply-Demand and Cross-regional Interconnection Lines FY 2018
Outlook of Electricity Supply-Demand and Cross-regional Interconnection Lines FY 2019
Outlook of Electricity Supply-Demand and Cross-regional Interconnection Lines FY 2020
Outlook of Electricity Supply-Demand and Cross-regional Interconnection Lines FY 2021
Outlook of Electricity Supply-Demand and Cross-regional Interconnection Lines FY 2022
Outlook of Electricity Supply-Demand and Cross-regional Interconnection Lines FY 2023
Outlook for Electricity Supply-Demand and Cross-regional Interconnection Lines FY 2024

Report on the Quality of Electricity Supply

Report on the Quality of Electricity Supply
Report on the Quality of Electricity Supply-Data for FY 2015
Report on the Quality of Electricity Supply-Data for FY 2016
Report on the Quality of Electricity Supply-Data for FY 2017
Report on the Quality of Electricity Supply-Data for FY 2018
Report on the Quality of Electricity Supply-Data for FY 2019
Report on the Quality of Electricity Supply-Data for FY 2020
Report on the Quality of Electricity Supply-Data for FY 2021
Report on the Quality of Electricity Supply-Data for FY 2022
Report on the Quality of the Electricity Supply-Data for FY 2023
Report on the Quality of the Electricity Supply-Data for FY 2024

Miscellaneous

Miscellaneous
Presentation at CIGRE Conference
Participation Report: Electricity Security Advisory Board High-Level Meeting at IEA Headquarters

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Information Disclosure
Annual Report
Annual Report FY 2025

Information Disclosure

Annual Report FY 2025

Update: 1/14/2026

Annual Report FY2025, is published according to the Article 181 of the Operational Rules.

Annual Report FY 2025 (9718KB)

6-2-15, Toyosu, Koto-ku, Tokyo, 135-0061, JAPAN

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About OCCTO

About OCCTO Message from the President Role of OCCTO in the Electricity System Reform Organization Information Office Location Membership Articles of Organization, etc

Information disclosure

Information Disclosure Annual Report Electricity Supply Plan Outlook of Electricity Supply-Demand and Cross-regional Interconnection Lines Report on the Quality of Electricity Supply Miscellaneous

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