I would say that Japanese school should teach how to manage projects. It is kind of business related topic, but whatever students become, they need to know how to make things go.
Project management skill is useful in any cases. For instance, if students really want to get higher grade on any subjects, they need to make a plan for that. Then, they will study as they planned. If they face the issues, they need to fix for that. They need to prepare for mitigation or corrective plan in advance.
However, the mandatory school does not teach how to make a plan. It depends on student’s mood. Is that correct?? At first, students have to know how to deal with management for all aspects. It might be a basic skill for students.