Three former students who were involved in making paper balloon bombs at a Nagoya school during the war saw and touched the "washi" (traditional Japanese paper) used to make the balloons for the first time in 68 years on Feb. 16.
The paper used in the construction of the balloons has been turned into book covers.
"It's hard to believe that we can actually see the paper after all these years. All these memories are rushing back now," one of the women, who attended Sugiyama Girls' School in Nagoya, said as she touched the paper again.