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UDON Diagonal Mar
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  3. UDON Diagonal Mar
RESTAURANT€€

UDON Diagonal Mar

Sant Martí, Barcelona
4.1 · 1,895 reviews
4.1

1,895 verified reviews

About

Let’s be honest about where we are. We aren’t in some rain-slicked alleyway in Shinjuku, and we aren’t in a family-run dashi temple in Kyoto. We are in Diagonal Mar—a gleaming, air-conditioned cathedral of late-capitalist commerce in the Sant Martí district of Barcelona. It’s a place of glass, steel, and the relentless pursuit of Zara sales. But even in this sterile purgatory of shopping bags and screaming toddlers, a human being needs to eat. And you could do a hell of a lot worse than UDON.

UDON is a chain, yes. A Barcelona-born juggernaut that has colonized the country with its brand of 'casual food.' Usually, the word 'chain' makes me want to reach for a stiff drink and a fast exit, but UDON manages to pull off a trick most franchises fail: they actually seem to give a damn about the noodle. When you walk in, you’re hit with that familiar, comforting industrial-strength aroma of toasted sesame oil, soy, and searing heat. The kitchen is open, a stage of controlled chaos where cooks toss heavy woks and steam rises in great, billowing clouds from the boiling vats of water.

The crowd here is a cross-section of modern Barcelona. You’ve got the office workers from the nearby Telefonica tower looking for a quick midday fix, the exhausted families refueling after a three-hour stint in the toy department, and the solo diners hunched over their bowls, seeking solace in a salty broth. It’s fast, it’s loud, and it’s efficient. If you’re looking for a candlelit conversation about your feelings, go somewhere else. This is a place for slurping.

Let’s talk about the Yakisoba, because that’s what the regulars are here for. It’s the workhorse of the menu. They don’t skimp on the 'amount'—a word that pops up in reviews like a mantra. These are thick, wheat-heavy noodles slick with a dark, savory sauce that hits all those primal umami buttons. It’s not subtle, but it’s effective. Then there’s the ramen. Is it the best ramen in Barcelona? No. But is it a respectable, soul-warming bowl of Miso or Tonkotsu that beats the hell out of a food court burger? Absolutely. The noodles have a decent chew, the pork belly has seen some actual flame, and the broth doesn't taste like it was reconstituted from a powder in a lab.

The real draw for the locals is the 'midday' menu—the Menú del Día. In a city where the lunch break is sacred, UDON offers a high-speed version that doesn't feel like a compromise. You get your starter—maybe some charred edamame or gyozas that actually have a bit of crisp to the skin—followed by a massive bowl of noodles and a drink. It’s a lot of food for the price, and in a neighborhood that can sometimes feel overpriced and tourist-heavy, that honesty matters.

Is it perfect? Of course not. The service can be indifferent when the lunch rush hits peak insanity, and you are, ultimately, eating in a shopping mall. But there’s a certain gritty satisfaction in finding a decent meal in the middle of a consumerist maze. It’s reliable. It’s consistent. It’s a reminder that even in the most manufactured environments, a well-timed bowl of noodles can still feel like a small, steaming victory against the world.

Cuisine

Asian restaurant, Japanese restaurant

Price Range

€10–20

What People Say

midday(27)amount(27)yakisoba(25)letter(22)shopping center(20)taste(16)franchise(14)app(10)

Cuisine & Features

Asian restaurant
Japanese restaurant
Noodle shop
Ramen restaurant

Opening Hours

  • Monday12:30 to 10:30 PM
  • Tuesday12:30 to 10:30 PM
  • Wednesday12:30 to 10:30 PM
  • Thursday12:30 to 10:30 PM
  • Friday12:30 to 10:30 PM
  • Saturday12:30 to 10:30 PM
  • Sunday12:30 to 10:30 PM

Dietary Options

Vegetarian optionsVegan optionsGluten-free noodles available

Good For

Quick lunchFamiliesCasual diningSolo travelers

Why Visit

  • Consistent, high-quality noodles in a convenient shopping mall location

  • Excellent value 'Menú del Día' that is popular with local office workers

  • Open kitchen design providing transparency and a lively atmosphere

Nearby Landmarks

  • 2-minute walk from Diagonal Mar Park
  • 5-minute walk from CCIB (Barcelona International Convention Centre)
  • 8-minute walk from Parc del Fòrum
  • 10-minute walk from Llevant Beach

Location

Av. Diagonal, 3, 35 CC

Sant Martí, Barcelona

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Frequently Asked Questions

Is UDON Diagonal Mar worth visiting?

Yes, if you are already in the Diagonal Mar area or the Forum and want a reliable, high-quality Japanese noodle fix without the pretense of a high-end restaurant.

What should I order at UDON Diagonal Mar?

The Yakisoba is the crowd favorite for its generous portions and savory sauce. If you want something lighter, the Tempura Udon or the Miso Ramen are solid, dependable choices.

Do I need a reservation for UDON?

Generally, no. It's a large space with high turnover. However, on weekend afternoons when the mall is packed, you might face a short wait for a table.

Is it good for families?

Absolutely. It's one of the most kid-friendly Asian spots in the area, with a casual atmosphere that handles noise well and a menu that appeals to picky eaters.

Reviews

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Price level€€
Visit Website+34 933 56 39 43

Rating Breakdown

5
54%
4
22%
3
11%
2
4%
1
8%

Based on 1,895 reviews

Information

  • Phone

    +34 933 56 39 43
  • Website

    www.udon.com/restaurante/udon-diagonal-mar
  • Hours

    Monday: 12:30 to 10:30 PM Tuesday: 12:30 to 10:30 PM Wednesday: 12:30 to 10:30 PM

  • Dress Code

    Casual

  • Reservations

    Not required

  • Address

    Av. Diagonal, 3, 35 CC

    Sant Martí, Barcelona

Last updated: Dec 28, 2025

+34 933 56 39 43Website