I have two Akitas. And yes, they can be aggressive.
Several other things I do:
I always make sure I am the first one through any door.
Every so often I just take something away from them for a minute or so, like a bone or such. I’ll also occasionally just move or take their toys or food. I am the alpha.
You can’t let them get by with anything. Always correct.
I don’t let them get in a position where their heads are higher than mine. Dogs take “king of the hill” literally. (I am convinced that is why so many little dogs are aggressive. It’s just natural to let them on your sofa, your bed. But that position makes them feel alpha.)
I had an Akita and he was tough. He was big and he shed like mad. He lived 14 years and we became very good friends but, he could be nasty.
I now have two German shepherds and they are a ball. They are 9 months old and we are a part of each other. I have siblings. a male and female. I guess I started them wrong (but I don’t care) they don’t want to do anything without me being with them. The female has some stomach problems but we are working on the problem. The male has a cast iron stomach. The male is 75 lbs and the female is 66 lbs. and I hope they get bigger. I love them.