Historians have extensively explored conflicts and reconciliation between labor and management, but have hardly considered how class hierarchy took shape and persisted. This article explores the birth of class hierarchy through the lens of the Tokyo Worker School. While education bureaucrats created this school as a training ground for skilled workers, the school's educators helped their students join white-collar positions and avoid the stigma against manual labor. By tracing this process, I explain how the aspirations of educators and students alike consolidated class hierarchy and explore why the collar line persisted despite the ascent of hitherto under-valued professions, such as engineering.

历史学家已经广泛地探索了劳动与管理之间的冲突与和解，但是几乎没有考虑过阶级等级制度是如何形成和持久的。本文通过东京工人学校的角度探讨了阶级等级制度的诞生。虽然教育官僚们将这所学校创建为熟练工人的训练场，但学校的教育工作者帮助他们的学生加入了白领职位，避免了对体力劳动的污名化。通过跟踪这一过程，我解释了教育者和学生的愿望如何巩固了阶级的等级，并探讨了尽管迄今为止被低估的职业（例如工程学）的崛起，领口为什么仍然存在。