Ramen Fuji is the longest-running ramen benchmark in Sioux Falls, and the kitchen behind it is the kitchen behind two more spots in the city — Ichifuji on East 10th and Oppa Chicken on Western. Same owner, same operator philosophy, same precision applied to three different formats. If you're following one Sioux Falls Asian operator's portfolio, this is the one to follow. The trio is the proof of consistency.
The thing to order is the broth. Pork cutlet curry, beef yakiudon, beef ramen with udon. The broth is the headline review across all 771 ratings — a long-simmered, patient, depth-of-flavor broth that does the heavy lifting of the bowl. The noodles are the supporting act. The toppings are the garnish. This is a room where the bowl is the whole event, which is the right order of operations for ramen and the wrong order of operations for a lot of restaurants that try to dress up their bowls with a dozen toppings to compensate for a thin broth. Ramen Fuji's broth is not thin.
The pork cutlet curry is the alternate order — when ramen isn't quite right and you want something heavier. The beef yakiudon is the "I want noodles but not soup" order. Both are reliable. The menu is small enough that there are no traps. Order anything; you'll be fine.
Hours: closed Tuesdays. The schedule is stable — the kitchen runs lunch through dinner without a midday closure, which is rare in this category. Get there at 11:30 for a guaranteed seat or 7:00 for the post-work rush. The room is small. Don't expect to roll in at 7:30 with eight people and walk to a table.
The room itself is utilitarian. Wood tables, chairs, the menu on the wall. Ramen rooms are not trying to be sushi rooms. The aesthetics is the bowl. The bowl is good. That's the deal.
For takeout: the to-go is functional but a ramen bowl does not survive a fifteen-minute drive. The noodles soak the broth, the toppings shed their crisp, and you're eating something that's seventy percent of what it was when it left the kitchen. Eat in. If you must go to-go, drive fast and have your bowls assembled at the table when you get home.
Cards, cash, both work. Tip in cash where possible. The phone is (605) 336-1688. The website is ramen-fuji.com — and it's a real website, which is rare in this category and worth flagging. Most of the Sioux Falls Asian operators are running everything through Facebook. Ramen Fuji has a website with a current menu and current hours. That's a small detail and a real one.
Compared to Ninja Ramen & Thai (the other ramen room in town): Ramen Fuji is the dedicated ramen specialist. Ninja Ramen is a sit-down hybrid that does ramen plus Thai. If you want one specific bowl, Ramen Fuji. If you want flexibility — a panang curry for one diner and a kimchi ramen for another — Ninja. Both are good. They're solving different problems.
Compared to Oshima: different cuisine, different format, different room. The cross-reference is that Ramen Fuji and Oshima are both rooms where the kitchen is the destination. The ambience is incidental. You're there for the food, the food is the event, and the rest is getting out of the way of the food.
The operator note. Same owner runs Ramen Fuji, Ichifuji Ramen and Korean Fried Chicken, and Oppa Chicken Korean Fried Chicken. If you become a regular at one, you'll find yourself at the other two within a year. The consistency across the three is the tell. This is a kitchen that knows what it's doing across multiple formats, and the only complaint you'll hear from regulars is that they wish the owner would open a fourth spot. That's the kind of complaint a city should hope to have.
If you're new to ramen, order the beef ramen with udon. It's the broadest entry point. Add a side of gyoza if it's on the specials board. Skip the soft drinks; the green tea is right.
If you're a ramen veteran, ask what the kitchen is testing this week. There's almost always a special, and the specials are usually the move.
The bottom line. If a friend asks where to go for ramen in Sioux Falls and you have one answer to give them, it's Ramen Fuji. If they ask where to go for ramen on a Tuesday — that's a different problem, see Ninja Ramen, which is open. But on every other day of the week, this is the answer.
The beef yakiudon is the "I want noodles but not soup" order.