The "Asahi Shimbun" newspaper reported on 26 March that the accident might warrant Level 6, based on its calculations. "The Wall Street Journal" stated that Japan's NISA would make any decision on raising the level. INES Level 6, or "serious accident", had only been applied to the Kyshtym disaster (Soviet Union, 1957), while the only level 7 was Chernobyl (Soviet Union, 1986). Previous Level 5 accidents included the Windscale fire (United Kingdom, 1957), the Lucens reactor (Switzerland, 1969), Three Mile Island accident (United States, 1979), and the Goiânia accident (Brazil, 1987).