This is my second review of this hostel, as I stayed twice, as mentioned in that review as well.
Umikaji is centrally located in Naha, near the monorail, near Kokusai Dori, and conveniently placed near a multitude of izakaya and other places to eat, drink, and purchase goods.
The staff at Umikaji have always been helpful, if not always chatty. But this is understandable since many of the guests tend to be Caucasian and may not speak Japanese (I was an exception but they may not have known). But they all work hard and are very accommodating.
One issue and question I had was with the lift they have, which supposedly was used to bring up luggage to the floors the guests would be staying on. This has never been used in the approximate month I stayed here. While a staff member always helped me carry my things up to the fifth floor, I want to know why the lift is not used.
Overall, this is a great place to stay with reasonable cost. I would recommend it to anyone.