Aji" means Japanese horse mackerel.
"Tatsuta-age" is a type of Japanese deep-fried dish.
Tatsuta-age is nealy same to Karaage.
But in case of Tatsuta-age, Ingredient is put in a sause, before coated by potato starch.
We usually clean the Aji.
Take out the small bones from it.
Cut it into bite size.
And put it into the sauce which is mixed Sake(rice wine), soy sause, grated ginger.
Leave it around 10 min.
Dry it with paper towels, and coat it slightly with potato starcy.
And then deep-fry it untill browned.
Photo below is Aji in the fresh fish counter of the supermarket.
Aji is one of blue back fish.
It is rich in DHA and EPA.