Settaya has a number of sake and miso manufacturing facilities set amidst historic buildings. It's not a big area and I took about 2 hours to explore the small shops, buildings, and museum. From Niigata, take the Shinkansen to Nagaoka and transfer to the JR Joetsu Line 1 stop to Miyauchi. From the East exit (turn left after the faregate), go downstairs and continue down the street for 1 block and turn right at the intersection with the traffic light. You'll see a Fuji Colour shop across the street. Then continue for less than 10 minutes to reach the sake brewery.

On the left you will see a long white building, which is a small museum with a sake tasting opportunity. On the right are smaller white historic buildings with a cafe and washrooms. There are placards here and there with QR codes that you can scan for an English audio tour.

https://qrtranslator.com/0000008036/000003

https://qrtranslator.com/0000008036/000004

The neighbouring north-south parallel streets have various other miso and sake shops in historic buildings. They're not museums per se but more shops where you can directly buy their products. Staff were friendly even though I was just a curious browser.

Settaya has an interesting history and is worth a visit. The Shinkansen doesn't operate that frequently to Nagaoka during the day but if you time it well with the Joetsu Line, you can get to Miyauchi in as little as half an hour.