JBC data update: as of October 1, 156 units are in operation, and 5 are mothballed.

Operating: 156 units
Mothballed: 5 units
Retired: 15 units
Planned/Under Construction: 1 unit

［Update related to coal-fired power units］

Sumitomo Osaka Cement announced that it would suspend operation of a coal-fired power unit at its Ako Plant at the end of March 2026. The company had begun considering suspending operations of Kochi Plant No. 3 at the end of March 2027, so JBC updated the list of planned suspensions and closures included in the summary information.

［Environmental Impact Assessment］

On August 20, 2026, a public review was held for the environmental impact assessment (EIA) Scoping Document to replace the “Miike Power Station” in Omuta City, Fukuoka Prefecture. It plans to convert the coal-fired power unit to a hydrogen-fired power plant.
(仮称)有明H2パワー発電所建設計画に係る環境影響評価方法書の縦覧について (EIA document is only available in Japanese)
The public comment period ran from August 20 to September 19, 2026. The Kiko Network submitted a written statement. (written in Japanese)
Note that Miike Power Station Unit 2 is currently not operating due to a “management decision.”

* The full database can be downloaded in Excel format on this page.
* Click here (PDF) to download a summary of Japan’s coal plant data.