As the "Trade Union and Labor Relations Adjustment Act" was amended in January 1, 2010, workers have become to establish multiple unions in a business or workplace unit from July 1, 2011.
They prohibited workers from establishing multiple unions which have the same organization object, but now fully permit workers to establish multiple unions which have the same organization object. So workers can freely establish or register more than one union in a business or workplace without any restriction.
Tolerance of multiple union is an institutional change that leads to a breakthrough transformation in the collective labor-management relations. It is a natural consequence because it defined the right to organize as a national basic rights of the Constitution. However, if there are two or more of union coexist in a business or workplace, and each exercises their own bargaining rights, there should be a few practical problems.
The bottom line is that the problems are an unreasonable arise from undergoing application of different working conditions according to labor combination in the labor of the same or similar contents. Even though there are the conflict between the trade union and labor union as well as between labor unions and employers, the increase in the negotiation cost and reduction of negotiation efficiency.
Revised "Trade Union and Labor Relations Adjustment Act" introduced the single bargaining channel system to solve these problems effectively.
The single bargaining channel system"s rule is that all the labor union unify the single bargaining channel in a business or workplace and make the bargaining representative union negotiate with employers, so apply one collective agreement to one business or workplace.
In spite of 4 years have passed after enforcement of this system, the detailed content of single bargaining channel system and management of the system are still very controversial. Therefore, I hope that this system can be fixed stably in the industrial field by examining the problem which is controversial or proved on the process of system enforcement in this study.