Japanese teacher/student relationships / 生徒と教師の絆
The Japanese student/teacher relationship is a very strong one. Most schools are fairly small, so each classroom of students has a single teacher that follows them through their career at the school. This teacher is held almost as responsible for the children as a parent would be, both in and out of school.
Teachers in Japan, good teachers, take this charge very seriously. It is not uncommon for teachers to look out for their students even outside of school hours and off of school property.