Hamaoka-cho
Reactor Data
Reactor Units
Every power reactor at this site as listed in the IAEA Power Reactor Information System (PRIS): reactor type and model, net electrical capacity, grid connection and commercial operation dates, and current status.
5 units: 3 suspended operation, 2 permanent shutdown.
Net capacity in service: 3,473 MWe.
| Unit | Type | Model | Net MWe | Construction | Grid | Commercial Op | Shutdown | Status |
|---|---|---|---|---|---|---|---|---|
| Hamaoka 1 | BWR | BWR-4 | 515 | 1971-06-10 | 1974-08-13 | 1976-03-17 | 2009-01-30 | Permanent Shutdown |
| Hamaoka 2 | BWR | BWR-4 | 806 | 1974-06-14 | 1978-05-04 | 1978-11-29 | 2009-01-30 | Permanent Shutdown |
| Hamaoka 3 | BWR | BWR-5 | 1,056 | 1983-04-18 | 1987-01-20 | 1987-08-28 | Suspended Operation | |
| Hamaoka 4 | BWR | BWR-5 | 1,092 | 1989-10-13 | 1993-01-27 | 1993-09-03 | Suspended Operation | |
| Hamaoka 5 | BWR | ABWR | 1,325 | 2000-07-12 | 2004-04-30 | 2005-01-18 | Suspended Operation |
Capacity, milestones and suppliers
| Unit | Design MWe | Gross MWe | Thermal MWt | First Criticality | Reactor Supplier | Turbine Supplier | Notes |
|---|---|---|---|---|---|---|---|
| Hamaoka 1 | 516 | 540 | 1,593 | 1974-06-20 | TOSHIBA CORPORATION | HITACHI, LTD. | Decommissioning from 2009-11-18 |
| Hamaoka 2 | 814 | 840 | 2,436 | 1978-03-28 | TOSHIBA CORPORATION | HITACHI, LTD. | Decommissioning from 2009-11-18 |
| Hamaoka 3 | 1,056 | 1,100 | 3,293 | 1986-11-21 | TOSHIBA CORPORATION | HITACHI, LTD. | Suspended 2010-11-29 |
| Hamaoka 4 | 1,092 | 1,137 | 3,293 | 1992-12-02 | TOSHIBA CORPORATION | HITACHI, LTD. | Suspended 2011-05-13 |
| Hamaoka 5 | 1,325 | 1,380 | 3,926 | 2004-03-23 | TOSHIBA CORPORATION | HITACHI, LTD. | Suspended 2011-05-14 |
Lifetime performance, through 2025
| Unit | Electricity Supplied | Load Factor | Energy Availability | Operating Factor |
|---|---|---|---|---|
| Hamaoka 1 | 73.6 TWh | 47.9% | 48.2% | 50.1% |
| Hamaoka 2 | 129.6 TWh | 59.6% | 59.5% | 60.8% |
| Hamaoka 3 | 171.1 TWh | 78.0% | 78.5% | 79.0% |
| Hamaoka 4 | 130.4 TWh | 79.5% | 79.5% | 80.0% |
| Hamaoka 5 | 39.0 TWh | 49.0% | 47.8% | 47.6% |
Operator: CHUBU ELECTRIC POWER CO., INC.
Owner: CHUBU ELECTRIC POWER CO., INC.
Source: IAEA Power Reactor Information System (PRIS), as of 2026-10-19.
Working Here
Per Diem Rates FY 2026
Per diem covers lodging and meals & incidental expenses (M&IE) for government and contractor travel near this facility. Rates are from the U.S. State Department foreign per diem tables for FY 2026.
$208
Lodging/Night
$107
M&IE/Day
$315
Total/Day
Japan: rate for locations the State Department does not list separately
U.S. Department of State foreign per diem, for U.S. government and contractor travel.
Photos
Photos of this facility from the NukeWorker photo gallery. Click the header or any photo to browse the full album.
Facility Map
Interactive satellite map showing the facility's geographic location. Marker color indicates current status: green for online, red for offline, orange for reduced power. Click the header to open in Google Maps satellite view.
34.6213, 138.143
Location & Contact
Physical address, phone number, and website for this facility. Use the directions link to get driving directions via Google Maps.
Plant Facts
About This Site
Written by NukeWorker from public records: facts that do not change. Operator, status and capacity come from the live data elsewhere on this page. Sources: Wikipedia: Hamaoka Nuclear Power Plant.
Hamaoka Nuclear Power Plant is at Omaezaki, Shizuoka Prefecture, Japan, on the Pacific coast about 200 km southwest of Tokyo, in an area above a subduction zone.
Read more
Construction of Unit 1 began on 10 June 1971 and the five boiling water reactors were built over three decades, with Units 1 to 4 supplied by General Electric designs and Unit 5 an advanced design. Unit 1 entered commercial operation in 1976 and Unit 5 in January 2005. Units 1 and 2 were permanently shut down on 30 January 2009. In May 2011, after the Fukushima accident, the prime minister asked for the plant to be halted, and Units 4 and 5 were shut down on 13 and 14 May.