Mysterious bacteria amaze schoolchildren Okamoto Yosino, who lives in the town of Sakai, 330 miles west of Tokyo, did not hear anything about the mysterious outbreak of food poisoning, which struck the Japanese schools, while one day her daughter, first grader Nana, came home with severe headache. Soon, Nana rose the temperature, diarrhea with an admixture of blood began. Okamoto urgently took her to the local hospital.