I thought I would update my review from before since it's been a few years and am sad to report that it has gone downhill. I know times may be tough, but yikes! BROILED SALMON & MIXED TEMPURA BENTO BOX: I ordered this to go and it came with a scoop of rice, 4 spicy tuna cut rolls (used to be 6), a small clump of salad, tempura (came without the tempura sauce), miso soup, and the saddest/hardest clump of fried/broiled salmon (came with side of teriyaki sauce). The portion has SIGNIFICANTLY shrunk especially for the salmon. The salmon was basically the size of the sauce dish container...I finished it in 2-3 bites. Due to this, I will sadly not be returning. read more

Mansun Sushi - Broiled Salmon & Mixed Tempura Bento. - Japanese Near Me - Walnut, California

The restaurant is located along the side of the street. I was able to find parking on the street right in front of the entrance. Dont miss it by pulling into the market plaza, but im sure you may park there. The place is small and not too busy when i visited. They offer a physical menu with limited selections, along with a QR code on the wall to scan that includes additional dishes. Before we even ordered, they quickly brought out complimentary salad, miso soup, and steamed edamame. What a nice surprise! Uni Rice Bowl was listed as market price but was very reasonably priced . It had about 4-5 pieces of uni, served in a very presentable sea urchin shell. It was light and very good. I can never pass up uni when it's on the menu! We also ordered some rolls, a variety of sushi , and toro sashimi. They do prepare sushi with a lot of rice, but I loved that they generously portion with large pieces of fish along with it. The fish was fresh and were great quality. Oh and free yummy green tea icecream to end our meal too! read more

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Slow service but otherwise good. Parking is very small but doable. Went during lunch and got a lunch box special which includes ice cream. I got the chicken one and it was a bit dry. Side dishes, on the other hand, were absolutely amazing! I'd say this is a decent lunch spot. read more

Mansun Sushi - Chicken lunch box - Japanese Near Me - Walnut, California

I've been coming to this gem for over 20 years! The lady owner is always incredibly welcoming and hospitable. Even with inflation hitting hard lately, you can still feel their sincerity in every dish. The portions are huge, and the sashimi is sliced generously thick! What touched us the most was when we mentioned how much we loved the tea, the owner immediately gave us a bunch of roasted rice (Genmai) so we could brew it ourselves! The interior is always cozy and spotless. It's rare to find a place that maintains this level of quality and warmth for decades. Highly recommended! read more

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Great quality sushi in a friendly mom and pop restaurant! The restaurant itself is very cozy, limited seating but luckily on a Tuesday evening, there was no wait. Small private parking lot adjacent to the restaurant was convenient! The meal starts with complimentary salad, miso soup, and edamame. These were a nice surprise! We then went on to the fried calamari and baked mussels. Calarami was nice and perfectly crispy with a drizzle of a sweet sauce, it was perfect to share amongst three people. The baked mussels were amazing!! Topped with cheese, a sweet and savory sauce, the mussels were juicy boys and definitely got us excited for our main sushi entrees! We went with the albacore roll, spicy tuna roll, eel sashimi, salmon roe sashimi, dragon roll, and yellow tail sashimi. Initial impressions - great presentation, and came out relatively quick! The sashimi was FRESH, and the perfect amount of rice. I dislike when there's any more than a pinch of rice and Mansun did the portions just right! The salmon roe was a generous portion, and with each bite, they popped heavenly in my mouth. The rolls were meticulously made as well and tasted amazing! For the three of us, I think we did well with the portions and by the end, felt quite satisfied... This is when the waitress offered complimentary ice cream! How could we say no...so we all decided on the green tea ice cream. It wasn't too sweet, and was the story book ending to our meal. They do offer bento box style meals with tempura as lunch and dinner specials as well, so in the future I'd absolutely like to try these out! Overall, highly recommend and will definitely be back. Don't let the unassuming exterior appearance of the plaza dissuade you from giving Mansun a try! read more

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No good. The salmon bento only came with a tiny piece of salmon, overcooked and dry. The tonkatsu was old and overcooked, also dry. Overall the food does not taste good. read more

I love this place, the woman who works here is so friendly and nice. Me and my family came here for a birthday and they made it really special. The sea urchin bowl is really good and unique. The sushi boat as well. And the lobster seafood hotpot. It is casual but I think because of the staff it is special. Would recommend! read more

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I can't believe I've been driving by this place for years without stopping in--what a hidden gem! The food here is absolutely amazing and unbelievably fresh. The fish quality blew me away--so high-grade, so clean-tasting, and not fishy at all. I was genuinely surprised at just how good everything was. I tried the sea urchin bowl, which was insanely fresh and flavorful, and the lunch special teriyaki chicken with tempura--the portions were very generous and satisfying. I also ordered the sushi lunch special, and honestly, the fish quality was mind-blowing. It felt like something you'd expect at a high-end sushi spot, not a casual place you just stumble into. On top of the food, the service was excellent. The owner is so kind and welcoming, and they even give out free ice cream at the end, which was such a nice touch. It really feels good supporting a local small business when the experience is this good. (5/5) -- Fresh, delicious, generous portions, and amazing service. I'll definitely be coming back again and again. read more

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Food was not good, chicken was very chewy. It made our stomach hurt. Customer service very rude. I don't recommend anybody try.

Ordered to-go around 11:40 a.m. on Sunday. Food came out fast and was nicely packed. Few sea urchin spines were mixed into the rice, which was a little disappointing, but everything else was fine. Side dishes were light and tasty. Regular size was $33 (large $44 with tax). I'll probably go for the large next time--it was better on my last visit. read more

Mansun Sushi - Sea Urchin - Japanese Near Me - Walnut, California

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My go to spot for sushi in the Diamond Bar area! In my opinion they have the best combination of quality, price, and service. The owner/lady in charge is super nice and provides great recommendations, and the sides come quickly when you sit down. One of my favorite things about this place is the Banchan they provide since it's Korean owned. The place itself is small and cozy and really never too crowded so you can get seated quickly. Great place for casual dinners as well as celebrations (love their sushi boat, it's a great deal) read more

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Esther was an amazing server for my friends bday dinner! The food was so good , she was so friendly and funny. Made us feel like family! We had a private room that was great for an intimate bday setting. read more

Mansun Sushi - Man Sun Sushi Boat - Japanese Near Me - Walnut, California

The food is always so good here! The sashimi is fresh and the uni bowl was soo flavorful and yummy. I came with my boyfriend and the sushi chef was sweet and made us the most adorable swan couple out of an apple. The owner is a nice Korean lady who has the nicest smile. Service is 10/10 and the food is also a 10/10! I highly recommend this place especially if you like uni! read more

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對生命而言，接受才是最善待自己的方式，無論是接受一個人的出現，還是接受一個人的再也不會出現～ 滿船， 一家也開好久老店了， 韓國人的日本料理， 就是會澎湃到讓你吃不下， 但品質跟日本師傅開的就是不一樣，他家最有名的應該是大家都熟知的海膽飯， 現在是29 元一份， 朋友點了他們的sashimi 全餐， XL 的，滿桌的東西， 讓我有點嚇到， 也太多太多了吧， 如果你是只喜歡吃正宗的日本師傅做的生魚片， 這家不用來了， 但如果不是嘴巴很挑的歪嘴雞，是喜歡俗又大碗， 划算的吃法，這家是選擇之一， 我記得他們以前生意超好的， 這次去還行， 不過沒有那麼熱鬧滾滾是真的了！ read more

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This place was amazing. Our server was very quick and sweet. As teens we normally don't expect such great service but everyone in the restaurant had positive energy and was very efficient. Along with this the food was great. read more

Mansun Sushi - Japanese Near Me - Walnut, California

Fresh seafood，delicious food. Recommend friends or family. Ice-cream colorful drinks. read more

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This place is perfect place for sea food lovers at the most reasonable price! Especially, very friendly services making to always welcome and sincerely care for customer's needs. They are professional people who know how to treat the customers. We enjoyed it every time, and it is worth it to even the difficulty of road close to get in there. We recommend this place to everyone who wishes to have fresh and high quality at an affordable price. We greatly appreciated that we could have this kind of restaurant in local. read more

The food is fresh and large portion. The service staff is friendly and gave us great recommendation. There were five of us and we have our room. read more

Mansun Sushi - Going going gone. - Japanese Near Me - Walnut, California

The food are amazing. And the prices are reasonable. Miso soup is amazing. Highly recommend to come to this restaurant if you around the area read more

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I can't believe I have pass this little gem so many times. From the reception to the meal. The food is incredibly fresh and amazing. The prices are unbeatable. The serving is outstanding. The different plates in a variety of combinations are fresh option. I'd wholeheartedly recommend this place to visit with your significant other because it could be a wonderful haven where you can engage in meaningful conversations and unwind over a soothing hot tea. read more

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The food and service here.... AMAZING!! this place is highly recommended.. I would say 10/10... I ordered the $70 special menu for 2 (minimum order: 2) and it came with a ton of food... from side dishes, korean pancake, tempura, fish katsu, steam egg, soba, sashimi, lobster soup and uni bowl.... honestly this place is exceeded my expectations...i found this place through an instagram advertising... but turns out didn't disappoint at all and the owner is very nice and friendly... Definitely will come back again soon!! read more

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Our family hasn't been here in a while. One Saturday, we decided to take a break from cooking and placed an online order. Glad to see that they were still consistently good even for to-go orders. Their online ordering system was powered by ChowNow and was very easy to use. Since our order was for a pretty early pick-up, the restaurant was still pretty empty when we arrived. I'm sure it was busy an hour or so later. They were very friendly when giving us our order. Our order was for a medium sashimi platter, beef teriyaki, and a chirashi rice bowl. The sashimi platter came with salad, edamame, and dessert. They also included banchan. For 4 adults, that was plenty of food. Everything was well packed for the drive home. read more

Mansun Sushi - Beef teriyaki, medium sashimi platter, chirashi rice bowl - Japanese Near Me - Walnut, California

Family run Korean style sushi restaurant. They are very find and welcoming to their guest and are very nice to kids. The food is delicious and the pricing is very reasonable. read more

Mansun Sushi - Unagi Rice Bowl - Japanese Near Me - Walnut, California

Now this place is a Real mom and pop restaurant. The food was delicious the rice ,,oh my gosh,, everything was fresh the real deal. I forgot the ladies name, but she was so kind and took care of my grandson for eating all his food. read more

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The place is awesome! Small family owned restaurant! Super friendly staff! The place is nice and welcoming! I brought my family over for birthday celebration. RSVP table ahead of time definitely help! Food quality is fresh and yummy! We ordered the man sun boat and the XL sashimi plate - definitely enough for 10 adults with 2 kids. It also came with a lot of side dishes! Can't ask for more! 100% recommend this place! read more

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Esther gave the best service! Ee had such a great time and the sushi was so great!! The salmon was amazing! 10/10 recommend! read more

Mansun Sushi - Japanese Near Me - Walnut, California

Came here with my buds tonight to grab some early dinner and we got an assortment of sides along with our main course. We ordered the large Sashimi platter which included tuna, salmon, sea bass, halibut, octopus, salad, edamame & ice cream. We got some many banchan dishes to go with it that our table was so full. We also got a freshly cut uni bowl which was very nice and I totally enjoyed that dish. Before I forget you get a side of edamame with your checkin on the Yelp app. With our order we got shrimp & vegetable tempura which was very good as it wasn't overly battered and it was good tasting. We got a side of soft shell crab I failed to take picture of but it was freshly made and tasty. We got oyster shooters which we all took a shot. We got some grilled little saury fish and grilled shrimp. The grilled salmon head was really good tasting. Service was top notch and ambiance was good. The seating was a little tight but our server helped clear our dishes as we finished off items on the table. Come and give Mansun Sushi a try! read more

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Yummy in my tummy. The owner was super nice and the food was really good! I had the uni bowl a while back and couldnt stop thinking about it, so i came back for more read more

Mansun Sushi - Uni bowl - Japanese Near Me - Walnut, California

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What a wonderful experience! The sweet lady that served us was super kind and attentive to my family, just like a mom! They serve huge portions even with many Korean banchan sides, that's a first at a sushi restaurant! The uni bowls and the sashimi dinner set was so fresh! It was so good we ate before taking a pic haha Price and quality was super good and reasonable! Ambience of the restaurant was very calming and many street parking along the side of Golden Springs. Even the caring details of serving roasted barley hot tea. Definitely will come again, it gives a homey feeling! read more

Mansun Sushi - Japanese Near Me - Walnut, California

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Such a great beautiful place with such good fresh sea food. The sea urchin bow is really Great hospitality and service read more

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Sososososoososososoososososoosososo. delicious. It's pretty good restaurant. We are enjoy it. read more

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First time here and will def be back!! Ordered the oysters which were so fresh, Uni bowl, tiger roll, kame, and oyster shooters. Standout was the Kame yellow tail. Food came out very quickly and the lady serving us was SO SWEET. Complimentary green tea ice cream as well :) she also gave us capybara keychains read more

Mansun Sushi - Spread - Japanese Near Me - Walnut, California

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Very late post- but our family came on Christmas Day and had the best time here! This was one of the few places that was opened that night for dinner and could accommodate for our large party. This place is a bit hard to spot but we ended up parking at the farmer's market lot and walking a few steps over. Our family sat in a private area room where everything was already set up too. The lady who took care of us (I'm assuming is the owner) was very sweet and patient. She even offered a few items as complimentary. All of our food items were brought out extremely quick! Sashimi Platter- It was very fresh and filling! They had no fishy scent or after taste. This can easily accommodate for 4 people. Shrimp and Mixed Veggie Tempura- This came out hot and crispy! Very delicious with the dipping sauce. Soba noodles- This was a refreshing appetizer with a little kick of spicy. eel Rice Bowl- So so good!!! The pieces were very rich and flavorful. Even though the bowl looked small, it could definitely be shared between 2 people. Lobster Seafood Pot- They gave this by using the lobster head from the plate to make the soup. Since it was a cold night, this warmed us up! Mansun Boat- This was by far the most eye catching dish! Very delicious! All the fish serves were fresh and made beautifully. We had 11 people and we barely finished this on top of the other dishes. Udon- The soup was warm with the right amount of flavor! It came with tempura, the fried tofu, and fish cake. This also came with pieces of tuna rolls on the side. Salmon Kama- This was salmon collar and they grilled it nicely. It was very filling and pairs well with rice! Katsu- Crispy and tender! Pancake- Loved this as an appetizer with their dipping sauce. Along the way, the owner also gave us oyster shots which was my first time. Surprisingly, it was great! It had a nice tangy flavor and went down smoothly. They also gave rice tea as well. At the very end, they had some green tea ice cream. Overall, we had the best experience here and left with happy stomaches. We will definitely be back again! read more

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Came by with a group for lunch. Welcoming and great service from the lady owner. She explained to us some of the special items and helped us decide. Portions are huge and come with many sides and miso soup. The soba and sashimi came on top of salad; so delicious with the spicy sauce. The owner was so nice to show us how to properly mix the sauce. Would return. read more

They have been opened for 23 years in Diamond bar! Food was great the beef teriyaki was delicious! Owner is very sweet and kind! She even gave a free read more

Mansun Sushi - Beef Teriyaki Lunch Special - Japanese Near Me - Walnut, California

The sushi here is a bit pricey, but definitely fresh and pretty delicious especially the sashimi! My party order the sushi boat, and it was enough to feed nine people to a decent degree, but there was still room in our stomachs afterwards. Just a funny detail, but the sushi "boat" that we got was actually a sushi bridge. I think that this restaurant is Korean owned since you get the Korean dining experience of all the appetizers and dishes that come before the main meal. It reminds me of the banchan that you get at Korean tofu soup places. We also ordered several uni bowls - as a tip, this is a rare commodity, so if they do not have uni, they will limit the amount you can order. For the market price we paid, the uni bowls were a little lacking especially in how much uni was provided. However, the rice in the bowl was pretty warm and delicious! We came for a birthday, and the server was extremely sweet which is why I bumped my review up to five stars! The service here was fantastic, as she provided some happy birthday glasses, a plastic cake for celebration, and several complimentary drinks on the house! Really appreciated her cheeriness and excitement for our birthday party. Since we were a group of nine, we were seated in one of the sectioned off rooms for privacy. read more

Mansun Sushi - Japanese Near Me - Walnut, California

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Service is good! Food is warm and tasty. Fresh sushi and hot udong are good for cold weather. read more

This is a place the locals know You should always order the best stuff, dont be cheap when it comes to sushi Oysters, mussels are all good Korean owned and the lady is extremely nice and I feel like she works there everyday. Always smiling They give the small dishes of sides like random stuff, it's good Definitely off the beaten path, its by the farmers market, just park there. The best part is that the lady give the babys/toddlers toys! For free. Every time I have come my baby comes out with something This happiness this lady brings to the kids makes me want to want to return to favor. Good spot to stop read more

One of the best sushi spots in diamond bar, the staff there is very friendly and nice. The sushi is always fresh and delicious, I ordered their lobster sushi, extremely delicious. read more

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Welcomed like family Great environment Big laughs Comfort food Excellent location read more

Mansun Sushi - Japanese Near Me - Walnut, California