Yes, this is still Tokyo, not Rio. But owing to the common history between Japan and Latin American countries, Asakusa yearly festival is more Brazilian carnival than traditional matsuri.
Of course, the entire first row of the public lining the streets is consistently made up of lecherous Ojīsans sporting massive teleobjectives and storing up on pictures of tits and arses for the Winter.
Beside aforementioned well-oiled and feathery naked bodies, are all sorts of samba musicians and other minor costumed troops (it must be hard to be the ones following some of the more peacocky floats, while yourself dressed in glorified rubbish bags). The theme of money (gold bullion, bank safes, credit cards…) seemed a pretty recurrent one: dunno if that’s a carnival tradition or only this year. Special weirdness points to the dancing Takarakuji booth (sponsor?). Finally, kudos to my hazy memory of Japanese classes for getting the (very obvious) 猫に小判 reference: also one of the very few troops that mixed in a bit of cutesy Japanese with the latin style.