As of December 2023, the total amount of plutonium owned by Tokyo Electric Power Co., Ltd., also known as TEPCO, amounted to approximately * kilograms, making up the largest amount of plutonium owned by electric companies in Japan. The majority of plutonium owned by TEPCO was stored overseas, mostly in France and the United Kingdom.
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JAEA. (July 14, 2025). Amount of plutonium owned by electric power companies in Japan as of December 2023, by location (in kilograms) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved August 04, 2026, from /statistics/1182179/japan-volume-of-plutonium-owned-by-power-companies-by-location/
JAEA. "Amount of plutonium owned by electric power companies in Japan as of December 2023, by location (in kilograms)." Chart. July 14, 2025. ÌÇÐÄÆƽâ°æ. Accessed August 04, 2026. /statistics/1182179/japan-volume-of-plutonium-owned-by-power-companies-by-location/
JAEA. (2025). Amount of plutonium owned by electric power companies in Japan as of December 2023, by location (in kilograms). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: August 04, 2026. /statistics/1182179/japan-volume-of-plutonium-owned-by-power-companies-by-location/
JAEA. "Amount of Plutonium Owned by Electric Power Companies in Japan as of December 2023, by Location (in Kilograms)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 14 Jul 2025, /statistics/1182179/japan-volume-of-plutonium-owned-by-power-companies-by-location/
JAEA, Amount of plutonium owned by electric power companies in Japan as of December 2023, by location (in kilograms) ÌÇÐÄÆƽâ°æ, /statistics/1182179/japan-volume-of-plutonium-owned-by-power-companies-by-location/ (last visited August 04, 2026)
Amount of plutonium owned by electric power companies in Japan as of December 2023, by location (in kilograms) [Graph], JAEA, July 14, 2025. [Online]. Available: /statistics/1182179/japan-volume-of-plutonium-owned-by-power-companies-by-location/
