That dark wooden exterior. The simple fabric curtain hanging in the doorway. No flashy signage, no photos of the food plastered in the window. In Japan, the best restaurants often look like they're trying not to be found — and that's exactly the point.
Before we went to Japan, we relied on Google Maps and TripAdvisor like everyone else. We had a list of places saved, most of them with English menus and photos of their dishes on the door. Some were fine. The best meals we had came from none of those places.
What a Noren Actually Is
A noren is a split fabric curtain that hangs in the entrance of a Japanese shop or restaurant. When it's hanging, the place is open. When it's taken down, they're closed. It's one of the most useful things to know before you go — half the best spots we found had nothing else to indicate they were even a restaurant.
The noren itself often has the restaurant's name or a simple design on it. Some are plain indigo cotton. Some are more elaborate. But the presence of one, hanging in a dark, quiet doorway on a side street, is a reliable indicator that something good is happening inside.

The Other Signs to Look For
Beyond the noren, there are a few other things we started using as shortcuts over the trip:
A queue of locals. Not a queue of tourists — locals. If working people on their lunch break are standing patiently outside a place, that place is earning it. We never had a bad meal when we followed a local queue.
A handwritten menu board outside. Not laminated photos of dishes. A handwritten or printed list, often entirely in Japanese. This usually means the menu changes and the kitchen is focused on what's good right now.
Counter seating. Some of the best meals we had were at 8-seat counters where you could watch the chef work. There's no hiding behind a closed kitchen at a counter — everything has to be right.
No English signage outside. This one is counterintuitive when you don't speak Japanese, but places that haven't adapted their exterior for tourists tend to be cooking for the neighbourhood, which is usually where the best food is.
Don't Be Afraid to Just Go In
The thing that held us back at first was not knowing what to expect inside — whether we'd be able to order, whether we'd look like idiots, whether it'd be awkward. The answer to all of those is: yes, briefly, and it doesn't matter at all. Japanese hospitality is extraordinary. Even with zero shared language, every place we walked into made us feel completely welcome. Point at things, hold up fingers for the number of people, say "arigatou gozaimasu" when you leave. That's genuinely enough.
The short version: If it looks quiet, slightly hidden, and has a noren — go in. You'll almost certainly eat better than anywhere with an English menu in the window.