Since it looks kinda derpy, I assumed it's a bootleg... but when I tried to find out more information about it, I stumbled upon the manufacturer's site for the figurine, and according to Google Translate, it says:
So assuming they're not lying through their teeth, it's official merchandise! According to their post and the auction, it's available at the Wonder Fest 2018 event, which I'm assuming is some sort of figurine/toy-centered thing. I guess Trefess Ariake 18 is another similar event.The permission result of copyright has come!
We received permission from Weed from "Ginga Densetsu Weed". Mr. Chairman, Thank you very much!
By the way, it got permission "One Fest 2018 Winter" and "Trefess Ariake 18".
Like I said, it's a bit derpy, but it's definitely leaps and bounds above the GDW figurines we're familiar with. The auction also calls it a garage kit so it may be one of those figurines you have to paint yourself?
edit: Found this page that confirms you have to assemble and paint the figurine yourself. (note: there's a few figurines of women in bikinis so it may be slightly NSWF). So I'm assuming that if you've got the proper paints yourself, you could customize into a figurine of any Akita in the Gingaverse
Apparently it's also saying these were available at last year's Wonder Fest, too?