Having eaten here and read the reviews I would like to start by saying don’t believe that the noise level is moderate. The noise level is very loud and we ate early and the very small restaurant was only half full. Our food ranged from good to very good. The service was adequate. The pricing was very high considering the experience as a whole. We were given a moist towel to start, a nice tradition however the towel was ice cold. The napkins are paper. The sake was very nice but served in a wine glass, I prefer the more traditional vessel. We enjoyed the food as the flavors were very bright and distinct. For $200 for my wife and I (and my wife doesn’t drink sake) we would expect a more sophisticated and refined experience. They should consider reducing the price and make it a take out only place. I would have rather eaten on a bench by the river where my wife and I could have leisurely enjoyed the food without the noise.

My husband is more of a sushi person than I am but there were enough offerings for me to have a complete meal as well. While tempura can be tricky to do well Oko prepared it flawlessly. It was light, crunchy and tasty. One thing missing was the “yam” tempura which I hope they will offer in the future. The sweet shrimp nigiri sushi with garlic brown butter literally melted in our mouths it was really nice. The Jonah crab shumai were delicate,flavorful and piping hot... be careful as they are quite tempting to dive in without caution. The sticky ribs were also very enjoyable with the exception of one order which was a tad bit fattier than the other. The Torched Black Cod was also a winner cooked just right it flaked effortlessly with little nudging from my chopsticks. Last and least (yes you read that correctly)would be the Yakitori Chicken Thigh and skin with garlic. Don’t get me wrong we enjoyed all of our items but if there had to be a least favorite I’d choose this one because with everything else being done so well this item had the was the least flavorful which was surprising given it was grilled and usually grilling an item imparts it’s own flavor markings but this was not our experience with this particular dish. To that end we enjoyed our experience here and will certainly return.

Very imaginative and tasteful cutting edge Japanese fusion.
Better than Ka Wa Nee (sp?)

Great food and wonderful service! I will definitely go back soon!

The menu is on the pricey side, but everything we ordered was superb both in flavor and in presentation, so I think the price point is warranted. Tip included, we got out for $225 for one adult and two teens. We had an early dinner around 5:30, so to be fair, the ambiance probably is excellent at night without the sun glaring in. Recommend going later. The decor is spare, but nice, and the tableware is organic and special. Our server was helpful and knowledgeable and steered us toward thing we will order again when we return tonight, just two days later. That probably says it all.

We tried about 20 different pieces of nigiri, all of which were excellent but extremely expensive. The hand rolls too were very good. The miso soup, seaweed salad, and soba noodles I would not get again. The pancake was very good. It was odd getting soft serve ice cream here, but it was good too. Even though I'm 115 pounds, it was very hard getting full off of a $200 check, but I enjoyed the meal overall.

My favorite place for sushi in Fairfield Co. I dream about this dinner, wish I could have it everyday. Delicious!

As a person who loves sushi, I can’t leave an excellent review for this place. I wanted to love it so I’m a bit bummed. As a Malibu girl, Nobu is my favorite so I probably do compare everything to it. I also love a good authentic Japanese restaurant. Oko was unfortunately far from a home run. To start out, we arrived right at our reservation time yet still had to wait -by the crammed door- for the table to be cleaned and set. It had clearly been empty. As we sat down, I soon learned they had paper napkins! P A P E R! For this kind of restaurant, HUGE no no! Shocking. Give your guests a nice linen so they can put it in their lap like any other restaurant of this category. Do not skimp details like that. I had to ask for 3-4 napkins to cover my white pants from getting ruined. That was a turn off. As for the service, we all agreed that it wasn’t that great. The guy who delivered my food did not know what kind of fish was in front of me. As for the food, it was not bad. It was quite tasty, perhaps due to the over-salting of quite a few dishes. I was also starved and it took forever for food to come. Excellent? No. It was mediocre sushi that was way overpriced. I expect to taste Katsuya or Nobu for that pricing and at least I leave stuffed. I was starved when I left. Last thing is they are not allergy friendly. No soy milk or alternative milk for my Coffee and no gluten free soy. Not even one sorbet or dairy/gluten free dessert. This is 2018. You have to be allergy friendly to make it. I have to say I will probably give it another shot in a few months to see if it has improved. I was so excited to finally have a nice sushi place in Westport so I will return once for a re-do.

Perfect Japanese pre theater. Food is interesting and delicious. Service is very good. Better to go on weeknight since weekend is jammed and very loud

This is a great addition to the sushi scene in Fairfield County. Best around by far. Will definitely be going back many times. Loved it.

Second time here. So unbelievably loud it is painful. Couldn't understand half of what the waitress was saying because it was so loud. We waited a good 30 minutes before anything hit the table while other tables seated after us were being served, which I believe was miscommunication about what we wanted first - which goes back to not being able to hear the waitress!
Sushi was excellent again. Loved it and it's not something you can get in this area. Many additional sushi items on the menu from our first visit. Underwhelmed with the other food to be honest. I would go back, sit at the bar and order sushi...maybe it's a little quieter over there? Hope they do something about acoustic panels to help.

Great space. Great food. Great service. Will return many times

Incredible food and service. Noise level was high, we were there on a busy night.

I'm ALMOST sorry to leave a good review... it will only make it twice as hard t get a reservation! Chef Brian has done it again (he is "The Cottage"). Menu is fresh and fun and the food comes out piping hot - or icy cold, in other words: perfection as the dish dictates. SO SO SO GOOD! I would never think to eat seaweed salad (at the ocean ...doesn't that stuff drift into your mouth in a most unfortunate manner ...?)...but, I tried a bite and then basically Bogart'd my friend's bowl. If Sushi "ain't your thang" ...the steamed Cod is Divine. ENJOY - but not too much (I want to get a table too). EXCELLENT!

Incredible!

Expected to be “wowed” and simply wasn’t. Our server, lackluster in every way, seemed to neither know nor care that we were there, start to finish. We had a later reservation which meant that the restaurant had mostly cleared out midway through our meal, which had zero impact on the attentiveness of our server. The food was decent but nothing special: the sushi no better than at least 2 other restaurants in town. The miso cod, clearly forgotten by either the kitchen or our server - maybe both since it was both late and lukewarm - was marginal at best. This classic dish, a staple item for many Asian restaurants and popularized by Nobu, had only a hint of the characteristic flavor. We’d initially thought that we might order one additional entree (and maybe even dessert) but decided to call it a night after the cod.

Should I find myself dining here at a future date I hope to have a better experience.

Brian and his team are up to great things! Congrats on an amazing spot and delicious food. Well done, see you all again soon.

Food was good but ridiculously expensive and portions too small! Unlikely to return.

Every single piece of food brimmed with umami. You could not ask for better quality food that is made into an art form. The duck gyoza took me to another dimension. The razor clam was a jazz ensemble in my mouth. The fish was fresh and masterful. The cocktails were vibrant and refreshing. The servers were friendly and knowledgeable however the pacing of the meal was so slow that you almost lose your excitement for the next course. The restaurant is so loud that it takes away from the food that is being served. I am one for cool spaces and using older spaces for new concepts, however with all the brick and wood there is no sound absorption. If the space allowed for a more relaxed dining experience I would run back for more. With all of this stated this restaurant is worthy of many Michelin stars.

Great staff but I couldn’t hear them over the noise
The whole place is made of brick and concrete
They said they are working on it

Best Japanese in CT. Creative. Love the razor clam and duck dumplings and age tofu. And hand pulled soba noodles.

Will be back soon to try more delicious creative dishes!

Birthday. Service stil has some new restaurant kinks, food was great rolls, sushi, hot appetizers (foie duck gyoza), uní and cavier shots... except the Kushii oysters flavor was lost under the yuzu ginger topping.

Wait person was wonderful but food was extremely slow to come out and it was quite noisy—difficult to hear each other at the table

We love the cottage, so were excited to try Oko. Agree with the many reviews complaining about the noise level, which is really striking. Service was uneven, but that's not too surprising given the restaurant has not been open too long. I'm sure these two issues will improve over time, but the problem for us was that the food was, I don't know, not that great? We started with the 10 piece nigiri. Dropped on our table all at once without explanation, had to ask what each piece was (again, service was uneven). Tuna was good, but other pieces were totally basic. Not bad, per se, but not a fine dining sushi level. Not sure if the issue is ingredients, technique, or both. Did not want to assume that only chefs trained in Japan can do sushi properly, but maybe true? See a lot of reviews calling this the best sushi in Fairfield county, but can certainly get much much better in NYC. Vegetable tempura was tasty, but presentation was a little sloppy (piled on a plate). We did two hot entrees: the donburii and the black cod. The donburii was authentic, although maybe a little underseasoned. The cod was disappointing (think we may have had a better version of this at the cottage actually). We may try Oko again in a few months, again we have faith in the team, but we were let down on our first visit.

The food was excellent! Cannot wait to go back! Was disappointed they forgot it was my husbands birthday so that was a bummer but cannot wait to come back. The dumplings are unreal.

Food is inventive and delicious, we had a variety of menu items and loved everything we tried. The space is tight but I didn't find the noise level uncomfortable or too loud as others have written. The service was excellent, attentive without being overly so and knowledgeable about the menu.

The noise level is impossible. We loved the food and the service. Really creative Japanese based dishes. Lots of opportunity to sample many small plates. Loved the deviled ramen eggs and the edemame.

Great place to go with your ex. Just too loud for us

Didn’t sample the sushi but loved the hot dishes and the cold soba noodles and tempura. Great for sharing nice wine list and drinks list.

Food was excellent. Restaurant needs to work on installing acoustic panels to cut down noise was very hard to hear conversation. Otherwise food was great and seafood extremely fresh.

An incredible meal, with creative, flavorful dishes. Will definitely return!

My daughter and I enjoyed a great meal here. We each had the 10-piece omakase. The fish was very fresh. The rice was well seasoned. We just returned from a trip to Japan. While clearly not on that level, it was by far the best sushi we've ever had in Fairfield County. The service was excellent from the time we arrived. Our server was great and even kept my sake chilled in the back between pours. I agree with other reviewers in that the noise level is very loud and the tables are very close together. I wouldn't let this deter anyone from coming here. Definitely a welcome addition to the local restaurant scene.

Although we had an okay experience as far as service and ambiance go, serving an endangered species to eat is VERY offensive (Bluefin tuna). Also, it is VERY offensive to serve food that requires cruelty to animals to produce (Foie gras). We won’t be back to this or any other restaurants by the same chef (The Cottage in Westport for one) until these items are removed from the menu.

Lots of potential because the food is very good and the service is friendly and attentive. However a few things were not good. There is no alternative to the salty soy sauce, which is almost unheard of now in sushi places and especially odd given how salty some of the dishes are. There was nothing in the washroom to dry one’s hands other than toilet paper and the pedal-activated lid on the waste bin didn’t open. Lastly, a small thing but a bit annoying is that the discount for ordering certain multiple items only applies if the chef chooses the items. The noise level made normal table conversation pretty much impossible so we will try this place again in a few months when more kinks are worked out but only on a quieter weeknight.

Had the uni shot, crispy tuna, beef nigiri, deviled ramen egg, and sashimi box and I cannot rave enough about every item !!! GO!

Excellent food / experience - best sushi I have had in Fairfield to date - rivals Nobu

OKO is extremely loud. It is very difficult to converse. The sushi is the best I have had in Fairfield County but other dishes like Pastruramen (a bland Pastrami ramen) fall short.

Smart Japanese infusion with modern cuisine! Delicious!

It has been such a long time since I have had real, good sushi. High quality fish without all the extra "stuff" so many restaurants use to try to hide the bad quality of the fish (I.e. cream cheese, deep frying, heavy sauces, etc.) The Omakase was fabulous, and the hand rolls delightful.

We were excited to have the okonomiyaki again after trying it first at the Cottage, but the meat on top wasn't quite as good as we remembered. The dumplings were also highly recommended, but I won't order those again. I unfortunately found the gyoza wrappers to be too thick and the filling a bit dry.

The soba platter was so delicious--the noodles the best I've had since Japan. We also loved our agedashi tofu--another nostalgic japanese food that's hard to come by.

Food amazing
Staff welcoming
Small but quaint spot
Can’t wait to go again

Top-level Japanese food, inventive and fresh. One caveat - the name OKO suggests that it serves okonomyaki, an amazing, delicious popular Japanese food akin to pizza. However, there is only one dish called "okonomyaki" and it is OK, not the best on the menu.
After getting over that disappointment, we were able to savor and marvel at the foie gras sushi, the wonderful tempura vegetables (with seasonal Fiddlehead Fern when we were there!) and yummy nemasake.
The noise level is a little high, the wind level was a little high at our table. But we had a great time, and saw good friends. The service was very attentive and accommodating.

“Fantabulous”! The food, the service the atmosphere...can’t wait to go back!