Showa Bubble Style? This is what a 63-year-old hot spring inn looks like

I didn't know until I checked, and I was surprised to find out that it has been in business for 63 years. The most recent renovation was 12 years ago, but overall it feels like it was just renovated a few years ago. The staircase design is especially reminiscent of the Showa bubble era, with a vaporwave style interior design, and that's probably how it is. Since I already booked a nearby inn and it's fully booked, I could only visit the entrance. There are also only a few pictures of the guest rooms on the platform, which is a bit of a pity.