Mitsubishi Heavy Industries
Mitsubishi Heavy Industries is the nuclear steam supply system vendor for 21 reactor units on record, 12 of them operating, totalling 11.6 GW of gross capacity across 1 country.
Built Japan's PWR fleet under Westinghouse licence and developed the two-, three- and four-loop M-series and the APWR. Holds a minority stake in Framatome.
| Headquarters | Tokyo, Japan |
|---|---|
| Founded | 1884 |
| Ownership | listed |
| Listing | TSE: 7011 |
| Roles in the chain | vendor |
| Japan | 12 |
|---|
Position in the chain
Facilities
| Facility | Stage | Country | Capacity / output | Status |
|---|---|---|---|---|
| Tokai-Mura (Mitsubishi Nuclear Fuel) | fabrication | JPN | 440tHM/yr | operating |
Mitsubishi Heavy Industries in context
Mitsubishi Heavy Industries has 1 facility on record in 1 country (Japan): 1 operating.
Mitsubishi Heavy Industries is the reactor vendor for 12 of the 419 operating units on record (2.9%), 10th of 13 vendors by operating units, 11,608 MW gross in total.
The median age of its operating units is 41.0 years, against 39.0 for the whole operating fleet.
Its 17 finished units with construction and grid dates took a median 3.6 years to build, against 6.0 across all finished reactors.
Mitsubishi Heavy Industries is the vendor of 3 reactor design lines (Mitsubishi 3-loop, Mitsubishi 4-loop and Mitsubishi 2-loop), covering 21 units on record, 12 of them operating.
How these are worked out: shares and ranks use the world totals cited in the table, and only named companies are ranked (unnamed or country-level entries in a source are not). A facility with no stated capacity is counted as a facility but adds nothing to a capacity figure. Vendor figures count operating units where this company is the recorded reactor vendor; ages count from the start-up year on record, and build times run from construction start to grid connection, as on the age and build-times pages.
What it supplies
| Product | For | Operating units of that kind |
|---|---|---|
| PWR fuel assemblies | pwr | - |
Recorded as capability against a reactor type or model line rather than against named units, because utilities do not publish fuel contracts.
Design lines
| Design | Generation | Capacity | Operating | Units |
|---|---|---|---|---|
| Mitsubishi 3-loop | II | 800–950 MWe gross | 8 | 9 |
| Mitsubishi 4-loop | II | 1150–1250 MWe gross | 4 | 5 |
| Mitsubishi 2-loop | II | 500–600 MWe gross | - | 7 |
Installed base
| Unit | Country | Status | Model | Gross MW | Online |
|---|---|---|---|---|---|
| Genkai nuclear power plant 3 | Japan | M (4-loop) | 1,180 | 1994 | |
| Genkai nuclear power plant 4 | Japan | M (4-loop) | 1,180 | 1997 | |
| Ohi nuclear power plant 3 | Japan | M (4-loop) | 1,180 | 1991 | |
| Ohi nuclear power plant 4 | Japan | M (4-loop) | 1,180 | 1993 | |
| Ikata nuclear power plant 3 | Japan | M (3-loop) | 890 | 1994 | |
| Sendai nuclear power plant 1 | Japan | M (3-loop) | 890 | 1984 | |
| Sendai nuclear power plant 2 | Japan | M (3-loop) | 890 | 1985 | |
| Takahama nuclear power plant 3 | Japan | M (3-loop) | 870 | 1985 | |
| Takahama nuclear power plant 4 | Japan | M (3-loop) | 870 | 1985 | |
| Mihama nuclear power plant 3 | Japan | M (3-loop) | 826 | 1976 | |
| Takahama nuclear power plant 1 | Japan | M (3-loop) | 826 | 1974 | |
| Takahama nuclear power plant 2 | Japan | M (3-loop) | 826 | 1975 | |
| Tsuruga nuclear power plant 2 | Japan | Mothballed | M (4-loop) | 1,160 | 1987 |
| Tomari nuclear power plant 3 | Japan | Mothballed | M (3-loop) | 912 | 2009 |
| Tomari nuclear power plant 1 | Japan | Mothballed | M (2-loop) | 579 | 1989 |
| Tomari nuclear power plant 2 | Japan | Mothballed | M (2-loop) | 579 | 1991 |
| Ikata nuclear power plant 1 | Japan | Retired | M (2-loop) | 566 | 1977 |
| Ikata nuclear power plant 2 | Japan | Retired | M (2-loop) | 566 | 1982 |
| Genkai nuclear power plant 1 | Japan | Retired | M (2-loop) | 559 | 1975 |
| Genkai nuclear power plant 2 | Japan | Retired | M (2-loop) | 559 | 1981 |
| Mihama nuclear power plant 2 | Japan | Retired | M (2-loop) | 500 | 1972 |
Sources
- Mitsubishi Heavy Industries, company source
- Global Nuclear Power Tracker, Global Energy Monitor, August 2026 release , CC BY 4.0 · retrieved 2026-09-06
How these sources are used, including the corrections applied on top of them and what is deliberately left blank · download the underlying data