Energy15 of country's reactors will pass 60-year operational threshold by fiscal 2050These two nuclear reactors at the Takahama power station in central Japan will have been in operation for 60 years by fiscal 2040. (Photo by Tomohide Yamaguchi)MASATOSHI IDAJune 5, 2026 01:22 JSTTOKYO -- Japan plans to replace up to five nuclear reactors by the 2040s, aiming to ensure a stable energy supply that does not rely on fossil fuel imports as many of its current nuclear plants near decommissioning age.