Minami (Osaka) on a Saturday night

I will be visiting and staying close to Minami on a Saturday evening and was hoping to spend the night out exploring the Amerikamura, the Shinsaibashi Shopping Arcade, Nipponbashi Den Den Town and the Dotonbori entertainment district. I know that most of the shops will be shut, but is it still a fun place to visit at night?

Are there pelnty of restaurants open till late? I'm hoping all the bright, colorful displays of the Dotonbori district will stay on until late. :)

Saturday night is the most vibrant time in a week. Shops will be gradually closed toward the night. But many bars, clubs & restaurants will open till morning.

To be on the safe side plan to visit Amerikamura, and the Shinsaibashi Shopping Arcade starting by 5 pm. While in the arcade have a look at the giant BIC electronic store. They have everything the stores in Den Den town have under one rof and many floors.
Den Den town is a maze of small stores (in many cases a different store on each floor of a narrow building) crammed with stuff and it is hard to look at it..
and of course the staff is right by you trying to sell, while in Bic and Yodobashi cameras (in Umeda Kita) you can browse more freely and the aisle are much wider

Dotonbori is "on" all day long and start going in overdrive as the stores are closing...