Sunflowers and the Japanese kanji, "chikara."
力 (chikara) is : Force, power, energy.
"Sunflowers have shown to be selective in absorbing metal, they were able to absorb heavy metals while leaving others － such as iron －behind. This increased their ability to quickly absorb the radionuclides. And, once they have absorbed the radionuclides,the sunflowers are then stabilized, ashed or vitrified and the resulting radioactive waste is stored in a disposal facility."
Sunflowers may give hope and power to the radiation problems Japan is facing.