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The Happy Sumo

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14647 Delaware St, Unit 100, Westminster, CO 80023-9187
12:00 pm - 9:00 pm
Open now
All hours
Sun 12:00 pm - 9:00 pm
Mon - Thu 11:30 am - 9:00 pm
Fri - Sat 11:30 am - 10:30 pm
More Info
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61 Reviews from our TripAdvisor Community

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Time of year
Showing 61: English reviews
Gillette, Wyoming
Level Contributor
68 reviews
29 restaurant reviews
common_n_restaurant_reviews_1bd8 22 helpful votes
3 of 5 stars Reviewed 3 weeks ago

My husband and I stopped for dinner around 7 pm on a Sunday. The location was well staffed and it wasn't overly busy. The crispy calamari was bland that we went it back and the server removed the charge from the bill. I had the Siam Noodles which had a great balance of noodle to meat to veggie ratio, but... More 

Thank ERBY2014
Aurora, Illinois, United States
Level Contributor
78 reviews
37 restaurant reviews
common_n_restaurant_reviews_1bd8 21 helpful votes
5 of 5 stars Reviewed 4 weeks ago

We enjoyed our choices at the Happy Sumo! I was delighted to find ingredients like bacon bits, macadamia nuts, and nacho cheese available on a roll! We also tried 2 deserts, and enjoyed them both.

Thank Scott F
Abu Dhabi, United Arab Emirates
Level Contributor
180 reviews
44 restaurant reviews
common_n_restaurant_reviews_1bd8 54 helpful votes
4 of 5 stars Reviewed 4 weeks ago via mobile

I loved the variety of food choices, but I was not wowed by my food. The vegetable pot stickers tasted horrible. The edamame was done perfectly. I also had the maki combo, which was good. I'd go back again, but avoid the pot stickers.

Thank hannajomeans
Denver, Colorado
Level Contributor
9 reviews
7 restaurant reviews
1 of 5 stars Reviewed 4 weeks ago

At the end of June, I took my lady friend to the Happy Sumo in Westminster to try some oriental food. We arrived in time to take advantage of happy hour, which included drinks and some sushi, which I always like to try. The drinks and the sushi were good, but when it came to the main courses, imagine my... More 

Thank MarcusC007
Broomfield, Colorado
Level Contributor
35 reviews
19 restaurant reviews
common_n_restaurant_reviews_1bd8 16 helpful votes
2 of 5 stars Reviewed July 18, 2016

I live in Broomfield so the Westminster Happy Sumo restaurant has been somewhere I visit regularly. The food is really good and the atmosphere is pleasantly unique. The one major issue I've been having lately is with their customer service. My most recent issue has been occurring when I call in to place orders to go. I call in and... More 

Thank Theresa B
Denver, Colorado
Level Contributor
471 reviews
321 restaurant reviews
common_n_restaurant_reviews_1bd8 151 helpful votes
4 of 5 stars Reviewed April 12, 2016

Celebrating a birthday, 11 people in total, we arrived a few minutes earlier than our reservation and were greeted immediately and seated within a few minutes. Prompt attention by the waitress (she is from Thailand) taking our drink orders which were delivered right away. Our food orders were taken and the food delivered also in a very timely manner. Found... More 

Thank The_Don_Francisco
Rifle, Colorado
Level Contributor
53 reviews
35 restaurant reviews
common_n_restaurant_reviews_1bd8 16 helpful votes
3 of 5 stars Reviewed March 22, 2016

Ate with family, looking for sushi. Sushi ok, other dishes really unimpressive, all with same thick, sticky teriyaki(?) sauce, miso soup was watery. Not what you'd expect at the price. Service was incredibly slow - dining room was NOT crowded, but our food took over 40 minutes to arrive, which is way too long. Husband was served the wrong beer,... More 

Thank Michelle D
Denver, Colorado
2 reviews
1 of 5 stars Reviewed March 2, 2016

Worst customer service I have ever experienced. I love the sushi here but that is the only thing going for them. I don't know why corporate can't see what a disaster the employees have turned this restaurant into. The last visit, we waited up front for about 10 minutes, no hostess in sight. Finally, a server comes up and takes... More 

Thank Nora Q
Erie, Colorado
Level Contributor
3 reviews
3 restaurant reviews
common_n_restaurant_reviews_1bd8 2 helpful votes
5 of 5 stars Reviewed December 26, 2015

The service is always friendly here and the food never disappoints. Their happy hour is the BEST in the area. For happy hour they have a great list of food (food that one would order even if its not happy hour). You know how you go into a restaurant's happy hour only to be disappointed that their well drinks are... More 

Thank Deena G
Level Contributor
575 reviews
448 restaurant reviews
common_n_restaurant_reviews_1bd8 260 helpful votes
3 of 5 stars Reviewed December 5, 2015

Had dinner there recently and drinks too while we waited for our table. Drinks at the bar then dinner. The bar is ok, the bartender not particularly attentive or engaging, plus she was chewing gum during her shift at the bar, quite odd as a service standard, or lack thereof. The sushi was passable, not great, surely I can think... More 

Thank finesilver

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Restaurant Details

Rating summary
  • Food
    4 of 5 stars
    3.5 of 5 stars
  • Value
    3.5 of 5 stars
    4 of 5 stars
Japanese, Sushi, Asian
Lunch, Dinner
Restaurant features
Seating, Waitstaff, Takeout, Reservations, Television, Wheelchair Accessible, Serves Alcohol
Good for
Families with children
Open Hours
12:00 pm - 9:00 pm
11:30 am - 9:00 pm
11:30 am - 9:00 pm
11:30 am - 9:00 pm
11:30 am - 9:00 pm
11:30 am - 10:30 pm
11:30 am - 10:30 pm
Location and Contact Information
  • Address: 14647 Delaware St, Unit 100, Westminster, CO 80023-9187
  • Location: United States  >  Colorado (CO)  >  Westminster
  • Phone Number: 303-920-4400

Questions & Answers

Here's what previous visitors have asked, with answers from representatives of The Happy Sumo and other visitors
2 questions
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Fort Collins, Colorado
9 months ago

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Questions? Get answers from The Happy Sumo staff and past visitors.
Posting guidelines
Typical questions asked:
  • Do you have gluten-free options?
  • Is there a dress code?
  • Do you allow dogs on the outdoor patio?