There's a restaurant on site. WiFi is free in public spaces. A terrace, a vending machine, and karaoke are also featured at Hotel Seagull Tempozan Osaka. The hotel can provide wedding services and tour/ticket assistance.
Pleasant stay overall.
The room was clean and big, it had nice views of the harbor, especially at night. The drawback is that Tempozan is an island that's a bit far from the heart of Osaka, and this neighborhood is a bit quiet at night. The only attractions are the aquarium and the ferris wheel. For these reasons, it is better to have a car, which is why I think this hotel might be more suited towards Japanese people or at least people with a rental. Otherwise, be prepared to ride the subway.
I didn't test the restaurant so I can't comment on that.
A Little on the Dirtier side . View was great although much time was spent here . Definitely needs carpet cleaning services. Beds are stiff. Plus side is they give you toiletries. And fresh towels . Convinience store and trains about 5 min walk.