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Much of the home training is devoted to teaching manners, proper social behavior, and structured play, although verbal and number skills are also popular themes. Parents are strongly committed to early education and frequently enroll their children in preschools.
Preschools (yochien), predominantly staffed by young female junior college graduates, are supervised by the Ministry of Education, but are not part of the official education system. The 58 percent of preschools that are private accounted for 77 percent of all children enrolled. In addition to preschools, a well-developed system of government-supervised day-care centers (hoikuen), supervised by the Ministry of Labor, is an important provider of preschool education. Together, these two kinds of institutions enroll well over 90 percent of all preschoolage children prior to their entrance into the formal system at first grade.
So Yots is in the 10%.