Liberdade

Jessica Matthews recommends:

São Paulo has the largest Japanese population outside of Japan, due to a mass migration in 1912. If you're a Japanophile check out the Liberdade district for amazing restaurants, shops, and fairs with traditional Japanese foods and goods. 

(Photo credit: brazilmycountry.com / guiadebairros.proprietariodireto.com.br  / www.vivareal.com.br / www.flickr.com)