Teachers and people in charge of the hygiene confirmed the approach on the protest campaign of the fluorine mouth rinsing spreading with Japan Education Center of Tokyo on November 23.
The fluorine mouth rinsing spreading traps children to the health hazard.
On that day, the doctor who was researching the fluorine problem reported, "Fluorine also has the doubt of carcinogenic".
The fluorine washout hole spreading is executed so that a part of municipality may prevent the decayed tooth.