The development of shop committees in Japan is one of the most important issues in Japanese management, and more case studies on shop committees should be undertaken. This article examines the organization and details of Shindo-kai at Kamaishi Ironworks (in Iwate Prefecture) during the 1920s and 1930s, as a case of Japanese shop committees. Originally an all-employee organization under Tanaka Mining, the forerunner of Kamaishi Ironworks, Shindo-kai changed into an organization of workers after the ironworks became an affiliated company of Mitsui Mining. Its representative council also changed into a bipolar system consisting of a management side and a workers side. According to its mandate, Shindo-kai's original functions were to negotiate wages and working conditions. However, records of meetings, accountings, and informal gatherings indicate that its actual functions were limited to consultations and petitions for workers' welfare. Opinions were exchanged at friendly and informal gatherings, placing a positive effect on workers' welfare, and Shindo-kai thus played an important role in contributing to the creation of a family-like and harmonious management.
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