Wikipedia
Unfair labor practice
An unfair labor practice in US labor law refers to certain actions taken by employers or unions that violate the National Labor Relations Act of 1935 (49 Stat. 449) (also known as the NLRA and the Wagner Act after NY Senator Robert F. Wagner) and other legislation. Such acts are investigated by the National Labor Relations Board (NLRB).
Unfair labor practice (Japan)
An is discrimination by an employer in Japan against a worker who is associated with a union, or refusal by an employer to negotiate with a trade union, or interference in the activities of a union. Unfair labor practices are defined under Article 7 of the 1949 . They are ruled on by Labor Relations Commissions.