Eager to maintain its energy policy in the wake of the 1986 Chernobyl disaster, Japan made sure concerns about nuclear technology were downplayed at the 12th Group of Seven summit it chaired in Tokyo days after the disaster, according to Japanese diplomatic records declassified Wednesday.

References to "radiation" and "concerns" about the nuclear accident that took place in what is now present-day Ukraine were deleted from a draft of the G-7 statement. The final statement instead dubbed nuclear power as "an energy source that will be ever more widely used in the future."

The declassified records show that Japan worked to build an international consensus on retaining nuclear power even while little was known about the cause of the Chernobyl accident or the scale of the damage.