Chris Y.
Yelp
If you're coming down to the main Shinsekai area, you are coming down here for one reason; food.
Shinsekai offers a variety of all sorts of food options. Think of it as a smaller Dotonbori of sorts, and everything is much more closer together, this is what you will have in the Shinsekai.
Lots of different storefronts to go to at Shinsekai, and is a fantastic place for larger groups, as many of the restaurants here are focused on offering large party portions, and have dishes that are meant to be presented as a communal meal.
If you're interested in more of the shops rather than just the restaurant style locations, you'd need to head towards the end of the Shinsekai area to get that experience, but to be honest, there's not a whole lot of them here anyways, so it's really the food that will be the focus.
Best time to drop by the Shinsekai? Definitely later in the night, particularly if you're here on a weekday, but even on weekends.
It's a bit odd, and sort of reverse of Dotonbori, as Dotonbori always feel the busiest towards the evening, while not as much during the day. Shinsekai seems to have the reverse issue, where it's busier during the day, but not quite so during the night.
I would recommend dropping by Shinsekai if you're looking for another eating spot with options aplenty.