There's very few places in Darwin that I continue to go back to, but Oishi Ya is one of them.
The food is very authentic Japanese food.
They have all the good fried stuff, like Donburi, Katsu-don, Katsu-curry and tako-yaki. Great service too. The food is very fast to come out. They also have all the Japanese beers and soft drinks. Overall a good experience, and a reasonably priced meal. Only down side is that they share the Mitchell Centre toilet.

approx. cost: DonBuri $14, Bento $18

Approximate cost: $15