Like my fellow brazillian said, we have a holiday for the dead, but it's not really a "party". Some people buy some flower, go to the cemetery and that's it. The aesthetic of the Día de Muertos is really cool, I would like to participate in one some day.
Carnaval has that big one, with the allegoric cars, complex costumes and such that is done profissionaly, but there are smaller ones all across the city that usually it's just people with simple costumes, lot's of alcohol and flirting (probably more, but I'll end it here. Hahaha), so I wouldn't say its a family event...

Japan and Brazil actually has a agreement, I think neither one needs vista and such for travelling to the other, so just buying the planes tickets is enough.

Since Brazil is so big, there are various different biomes. Aside from the Amazon Rainforest, there is Pantanal, Caatinga, Cerrado... All with different landscapes and animals!