Here in Okinawa there is a local spirit called 泡盛 awamori.
It is completely distinct from sake (and from shochu). It's only made on the islands of Okinawa, and there are very many kinds for sale.
So far the locals I have asked don't know whether there's an awamori manufacturer that tourists can visit.
I don't mind where it is, as long as it's on the main island of Okinawa. I do want a place that offers samples or tastings and doesn't mind that you're not buying. I'm not expecting them to get me drunk
(-; I'd prefer a place that's used to lots of tourists I think, where I wouldn't have to arrange something in advance and where I wouldn't be putting the out by asking for special favours.
Oh and I don't really want a paid tour with an outside company, just us going to the factory on our own but we don't mind if other tourists are there too. Something like "cellar doors" in wine-growing areas or like in tequila/mezcal making areas of Mexico ...