Umeda / Kita — polished, central, business-friendly
Umeda is Osaka's northern hub: department stores, office towers, and the sprawling Osaka Station complex all in one area. It's polished and extremely well connected, with direct access to the Midosuji Line and easy links out toward the airport. It suits travellers who want a big-city base with strong shopping and dining on the doorstep, without being in the middle of the nightlife district.
Namba / Dotonbori — the tourist centre of gravity
Namba and neighbouring Dotonbori are where most first-time visitors picture Osaka: neon signs, canal-side restaurants, and streets that stay busy well into the night. Staying here puts you inside the energy, at the cost of more noise and a livelier crowd right outside your window. It's also a strong base for day trips, since Nankai Namba station runs directly toward Kansai Airport and toward Wakayama and Koyasan.
Shin-Osaka — built for the shinkansen
Shin-Osaka exists almost entirely around its shinkansen (bullet train) station, one stop north of Umeda on the Midosuji Line. It's less charming to walk around, but it's the natural choice if your trip is bookended by shinkansen journeys to Tokyo, Hiroshima or elsewhere, since it removes an extra transfer with luggage on your travel days.
Tennoji — quieter, and closer to Kansai's south
Tennoji sits at the southern end of the Midosuji Line, anchored by Abeno Harukas and Shitennoji Temple. It's calmer than Namba, generally better value, and well placed if Nara or the south of Osaka feature heavily in your plans, while still being one direct ride from the centre.
Because the Midosuji Line connects all four of these areas directly, the practical difference between them is smaller than it looks on a map — factor in atmosphere and budget as much as raw location.