<P> Some major labour unions organise rallies and demonstrations in Tokyo, Osaka and Nagoya . Japan has a long history of labour activism and since 1945, has had a communist and socialist party in the Diet . In 2008, the National Confederation of Trade Unions (Zenrōren) held a rally in Yoyogi Park attended by 44,000 participants, while the National Trade Unions Council (Zenrōkyō) held its May Day rally at Hibiya Park . Rengō, the largest Japanese trade union, held its May Day rally on the following Saturday (3 May), allegedly to distance itself from the more radical labour unions . </P> <P> 1 May is known as Labour Day and is a public holiday . </P> <P> 1 May is known as the Workers' Day and is a public holiday . From the 1960s through the 1990s, left - wing parties and workers' unions organised major marches on this day . Recently, only symbolic marches take place on this day . </P> <P> 1 May is officially known as Dia do Trabalhador in Portuguese . It is a public holiday in this Special Administrative Region of the People's Republic of China . </P>

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