Koizumi gets emotional in Brazil

[lexico]

why are there so many Japanese in brazil ? Any specific reason ?

Wikipedia says, in Japanese-Brazilian;

Brazil is the Latin American country that has received the most ethnic Japanese immigrants, as well as the host country of the largest Japanese community outside Japan (numbering between 1.3 and 1.5 million). The first Japanese immigrants (mostly farmers) came to Brazil in 1908 on the Kasato Maru from the Japanese port of Kobe, moving to Brazil in search of better life conditions. Many of them (along with Chinese immigrants) ended up as laborers on coffee farms. At the time, Brazil was experiencing a shortage of farm workers and turned to European immigrants and then to an influx of Japanese workers to satisfy this demand. Some ethnic Japanese came from neighboring Spanish-speaking countries.

Some Japanese also went to Brazil from Macau in 1999, when Portugal returned the Asian colony to mainland China. These Japanese are descendants of Japanese Catholic refugees expelled by shoguns, and they can also speak Portuguese and its creole — Patuá — but speak Cantonese Chinese as an additional language rather than Japanese.