was a Japanese politician who served as the governor of Fukushima Prefecture of Japan from 1988 to 2006.
Sato was initially an enthusiastic supporter of nuclear power. Like his predecessors he appreciated the jobs and subsidies associated with the nuclear plants in the prefecture. He believed it was part of Fukushima playing a role in the Japanese nation as a whole. In 1998, he conditionally agreed the controversial use of mixed oxide plutonium uranium fuel (MOX) at the Fukushima plant. He subsequently withdrew his support after discovering a cover-up of reactor malfunctions and cracks.
Between 2002 and 2006, twenty-one problems at the Fukushima plant were reported to his office. The whistleblowers, including some employees at the plant, bypassed both Tepco and Japan's Nuclear and Industrial Safety Agency because they feared that their information would go straight to Tepco. This was later shown to be a very justified fear. Sato became an increasingly bitter critic of the plant and Japan's entire energy policy as directed by NISA's powerful government overseer, the Ministry of Economy, Trade and Industry.
In 2006, Sato was forced to step down and in 2008 was prosecuted and convicted on bribery charges. He claimed the charges were politically motivated. Following his conviction, he wrote a book of his experiences called Annihilating a Governor explaining his concerns about nuclear power and how he was set up and wrongfully convicted. The book was largely ignored until the events of the Fukushima Daiichi nuclear disaster sent it rocketing up the bestseller list.
Satà  died on 19 March 2025, at the age of 85 at a nursing home in Koriyama City, due to old age.