I can't translate but it's probably him talking about how awesome Ameterasu is while referring to her as male which Issun probably informs him of this then she turns into a girl and he is surprised to find out Amaterasu's gender
I'm sure he'd turn out to be a very handsome and splendid gentleman, totally.Wan.A girl!!...Well, I guess it'd be faster if you just see it for yourself?...Ooh, what a surprise.
Ama-kou can become like that too.
x Apparently.Seriously?Wan.x ReminiscingBefore I knew it, I became like this.Oina Style