The Echico CDS is a really neat little warships.
But the Senjo, I'm sorry, despite a good amount of details and original tweaks is largely from what I can see a heavily modified version of the Kokoan 1934 light cruiser project I did for entry in the Treaty Cruiser Challenge we did some time ago. It is even exactly 1284 pixels long, just like the CL I did.
Plus, I also can see some bits from other ships from my Koko AU. And the bridge from an an Agano class, which I alsodrew for real life IJN.
You can keep the drawing and use it in you AU as much as you please, it is not a problem, but you have to add me in the credits, before youre name in this case.