|Project Details||Tsuruga already hosted two conventional reactors and in 1983 preparations began for the construction of a new fast-breeder reactor called Monju.|
Monju functioned for less than a year since its completion in 1994. The fast-breeder reactor — a cornerstone of Japan’s atomic energy strategy dating back to the 1950s — would use spent nuclear fuel from other atomic plants and is designed to produce more fuel that it consumes. The reactor, named after the Buddhist deity of wisdom, has barely operated since it first generated electricity in 1995, the year it suffered a sodium leak that led to a fire and subsequent attempted cover-up. Safety problems have continued to plague the facility ever since.
“The potential closure of Monju would be a major blow not just to the fast-breeder community in Japan, but also those supporting reprocessing of spent fuel,” M.V. Ramana, a professor at Princeton University’s Nuclear Futures Laboratory, said by email. 
Decommissioning will be big business, Monju means abandoning a project that has devoured more than 1 trillion yen ($9.82 billion) of government funds. According to other sources  the government has already spent 1.2 trillion yen (US$12bn) on Monju. The government calculated that it would cost another 600 billion yen (US$6bn) to restart Monju and keep it operating for another 10 years. Decommissioning has a hefty price-tag. According to a 2012 estimate by the Japan Atomic Energy Agency, decommissioning Monju will cost an estimated 300 billion yen (US$3bn).
|Project Area (in hectares)||100|
|Level of Investment (in USD)||13,000,000,000 USD|
|Type of Population||Semi-urban|
|Company Names or State Enterprises||Japan Nuclear Cycle Development Institute (JNC), owner of Monju from Japan|
|Relevant government actors||JAPA, Japan Atomic Energy Agency|
Government of Japan
Nuclear Regulation Authority
|Environmental justice organisations and other supporters||- Masaichi Miyashita, heads the secretariat of an anti-nuclear group in Fukui Prefecture (2016)|
- "Stop Monju" and Citizens Nuclear Information Center, in 2001 campaigning for a million petition signatures for the scrapping of Monju FBR.
- 2010: December 8 is “Phase Out Nuclear Energy Day” in Japan. The “Phase Out Nuclear Energy Day” campaign, which now includes a wide range of people, is supporting campaigns around country December 8 is the anniversary of Monju's sodium leak and fire in 1995.
- Wise International.
- Citizens' Nuclear Information Center, Japan.
- Abbot of Myotsu-ji, a Shingon Omuro temple in Wakasa Bay in Fukui Prefecture