Donburi, or 'rice bowl', can be one of the most satisfying meals in a country where portions are not super-sized (just like the people!).
Hatsuki is a Donburi senmon ten (specialty shop), and while most donburi shops offer a variety of fried meat or tenpura to top off the hefty bowl of rich Japanese rice (rice grown domestically in Japan is heavy, high in calories, and about five times the price we pay for rice in the US), Hatsuki further limits the choices to the most classic of donburi options, Oyako (parent-child), and Don (pieces of chicken and delicious soft-cooked egg on rice). This is the best place to eat Oyako Don in Osaka, and is worth the trip, though, not unlike pizza, bad donburi is often still pretty good.
So if you don't have the time to trek out to KitaShinChi, there are numerous donburi shops around Umeda or Shinsaibashi, easily identifiable by the plastic food models in front of the stores.