Japanese dagger in Aynu style?

[Tatyana Dianova]

On the dark and unsharp seller's photos the sword looked Aynu style, but looking closer and after cleaning it is pretty well made and most probably antique Japanese dagger, maybe Aynu inspired, for European market.
The blade was heavily rusted and has many small nicks from use; it has no visible hamon and hada. I wasn't able to remove it from the hilt, although there is an opening and no Mekugi. Maybe it is glued in or heavily rusted inside.
Any opinions on this one? Anyway, I love the cute dragon carving