The Japan Labour Union League (日本労働組合同盟, Nihon rōdō kumiai dōmei; abbreviated "Nichiro")
was a trade union centre in Japan. It was founded in December 1926, following the split in the Social Democratic Party as the leaders of the dissident Japan Labour-Farmer Party were expelled from the social democratic Japan Federation of Labour (Sodomei) trade union centre. The Japan Labour Union League functioned as the trade union wing of the Japan Labour-Farmer Party, and had around 5,000-6,000 members.
References
Japan Labour Union League Wikipedia(Text) CC BY-SA