Terrorism in Brazil has occurred since at least the 1940s.
Terror organizations
Shindo Renmei
The Shindo Renmei were a Japanese-Brazilian terror organization whose attacks were focused on resistance to the Japanese surrender at the end of World War Two; attacks were perpetrated against other Japanese-Brazilians.
During the Brazilian military government from 1964 to 1985, terrorism was a term frequently used by the state. All forms of opposition to the military regime were considered forms of terrorism; opposition members were deemed "terrorists." An incident of right-wing terrorism known as the Riocentro 1981 May Day Attack occurred in 1981, perpetrated by a sector of the military dissatisfied with the democratic opening of the regime.
Present
On 21 July 2016, two weeks before the scheduled start of the Olympic Games, Brazilian Federal Police busted an Islamic jihadist terrorist ring plotting to wreak havoc in a manner similar to the 1972 Munich massacre. 10 people suspected to be allied with ISIS were arrested and two more were on the run. On 2 May 2017, Palestinian migrants threw a homemade bomb at far-right protesters, leaving several injured in São Paulo. On 6 September 2018, the far-right presidential candidate Jair Bolsonaro was stabbed during a political campaign in Juiz de Fora, Minas Gerais. On 13 March 2019, two former students opened fire at a Brazilian school on Wednesday in Suzano, São Paulo. The pair killed at least five teenagers as well as two school officials before committing suicide in an attack that police said was inspired by the 1999 Columbine massacre in the United States.
Visa denials - in 2011, legislation was introduced to deny visas to persons and/or expel foreigners convicted or accused of a terrorist actin another country;
Terrorism during the World Cup - in 2011, legislation was introduced that deals with specific crimes, including terrorism, during and preceding the World Cup;
Penal code update - legislation in 2012 sought to update the Brazilian penal code to include sentencing guidelines for terrorism crimes;
Terrorism definitions - legislation in 2013 sought to define terrorism under the Brazilian Constitution.
Criticism
There is a large concentration of Middle Eastern immigrants in the area near the Paraguay, Argentina, Brazil border. Some authorities monitoring the area have stated that Brazil should participate more in the international fight against terrorism.