This place is awesome, no misses for me!! First off the quality of food is top tier, its reasonably priced and you get good quality and quantity, sometimes places are one or the other and not both. Next is the ownership and hospitality, they accept phone orders and are always so welcoming to their Customers :) Everything is made fresh so expect to wait a little but it wont take that long. Lastly I want to shoutout the business name and how it actually ties to their menu (which is super easy btw). They have a wide variety of sauces, all are super good you cant go wrong and if you ever want to sample one theyll let you try them so you get what you want. Also sidenote they give out free miso soup when you get a plate which is nice for the stomach after a nice big meal. Keep it up guys, please dont franchise lol!!! read more

Happy to finally play pickleball with Joe and grab a quick lunch together after some friendly, but competitive games. Secret Sauce is located inside the plaza with Sprouts supermarket. Restaurant is small, clean, and strictly fast food vibe. Service is friendly. Secret Sauce is a small eatery at upland specializes in Asian style pork katsu, bento style. I order build your own set with chicken katsu that comes with a small cup of miso soup, fruits, and salad. Good variety for bento. The new sample is spicy chicken katsu. Overall, my chicken katsu is a bit dry, that's why I take out one point. Size of dish is good. As for dipping sauces, I feel there are rooms to improve. read more

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Whenever I come here, I usually order the curry sauce with tonkatsu. The macaroni salad on the side is really good, and the rice portion is generous, so the meal is filling and feels like a good value. The staff have always been kind and welcoming, which makes me want to come back again. read more

5/29/26 Secret Sauce Upland, CA...My daughter and I came here for the first time. We really enjoyed it. We both got the Katzu Chicken plate. I had the salad and fruit as the two sides and the peanut sauce was excellent. We also tried other sauces. They were all great! Service here was excellent! Restaurant was very clean too! Secret Sauce is a fitting name! Highly recommend! read more

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Just tried Secret Sauce and I'm OBSESSED My go-to order is the Chicken Katsu plate -- it comes with veggies , a house salad , fruit , AND their pear sauce + a side of miso soup The chicken katsu is always perfectly crispy like actually 10/10 crunch every time And the pear sauce?? It lowkey reminds me of yellow Thai curry and it's SO GOOD They also give sauce samples which I love -- today I tried basil , sweet chili , and spirulina Everything is cooked fresh to order ‍ so I definitely recommend ordering online and picking up if you don't want to wait If you're in the area... you NEED to try this spot read more

Secret Sauce - Katshu Chicken Bowl Build Your Own Set - Build Your Own Set - - Japanese Curry Near Me - Upland, California

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The food here was good, the portion sizes were generous, and the pricing was good. Lots of options to build what you like. read more

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Want something quick and delicious? Look no further than Secret Sauce! PLUS prices are so good and portions are generous. High quality, fresh food, and ALL the sauces you can imagine. I loved pairing the katsu in a few different sauces. And their mac salad is sweet with apples in it. My only issue with this place is that I live 6 hours away and cant make it back again soon. read more

Walking in to some nice pop tunes, warm and bright. The lady who took my order was so nice and appreciative... She greeted me with a smile and gave me the run down of the menu. I ordered the Pork Katsu plate with Rice, Veggies and a macaroni salad on the side. She he plate comes with a miso soup that's complimentary. The sauce I had to go with is called "Crazy Spicy" and though it was crazy, it was tasty. Pork Katsu 8.9 / 10 fried to perfection, juicy and went well with the sauce. Miso Soup 8.5 / 10 standard but a bit on the saltier side which I liked. Mac Salad 5 / 10 now it's not that it wasn't good at all, I just don't do apples and raisins in my Mac salad, not a sweet guy. Veggies, Rice, Salad 7 / 10 standard items, good dressing All in all, I had a great experience, and a place I will be beach for something nice, quick and had the staple items. Meat, Carbs, Greens read more

Secret Sauce - Inside! - Japanese Curry Near Me - Upland, California

4.5 stars. This is a small hole in the wall place with pretty good katsu. I got the katsu rice bowl with Japanese curry and my bf got the build your own with katsu, rice, Mac salad, and house salad with Japanese curry. Both came with miso soup that had good flavor. The katsu rice bowl is a fantastic deal. It's so hard to find a decent meal under $15 nowadays. The rice bowl had plenty of rice and TWO pieces of cutlet. The japanese curry was tasty and you can see all the pieces of onion. The service was solid, the woman was very kind and we were asked how things tasted even though it was a quick order-at-the-front-and-go type of place. Glad we dined in as we got to try a few of the different sauces that are offered. When we come back, I'm getting the basil sauce for sure. read more

Secret Sauce - Katsu rice bowl with Japanese curry - Japanese Curry Near Me - Upland, California

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Food is always delicious here, they never dissapoint. The service is top notch. I love their basil sauce. Their orange sauce mixed with their spicy sauce is pretty good too. My husband LOVES their tonkatsu sauce you can always get sample sauces to experiment with. read more

Secret Sauce - Miso soup - Japanese Curry Near Me - Upland, California

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Good value for the price! My husband and I shared one meal. Not necessarily something we will come back to again and again, but definitely a nice quick, healthier, cheaper option than normal eating out. read more

Secret Sauce - Udon, katsu, veggies, macaroni, and miso - Japanese Curry Near Me - Upland, California

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Chicken katsu and curry were ok. Fried tofu was a bit greasy. Rice was mushy on all our plates. Grilled chicken was fatty and lacked any flavor. Got four bowls. Very overpriced. It was easy to order. read more

I placed an order for pick up and I was running a bit late. Despite being late and traveling home, the katsu chicken stayed sooooooo nice and crispy!!! I was super impressed! I got the customizable plate with a rice base, chicken katsu, Japanese curry, house salad, and macaroni salad. I also got a side of extra sauce in a big cup and an order of fried tofu that also came with a side and I picked Japanese curry again. It was a lot of food and came up to 30 dollars, which is ok because it can last me about 2 to 3 meals since the chicken katsu came with two fillets!! To start off, the rice was so fresh which is not something I see a lot at quick service restaurants so I was very happy about that. Next, the chicken was super juicy and crispy at the same time. I also liked that the chicken didn't have any hard or squishy parts, like a lot of other places that sell katsu chicken do. Curry was the best part and it was extremely flavorful. Lastly, the place is super cute and cozy. Staff was welcoming, and would be a nice spot for a quick lunch. Overall totally loved it and will be going back often. read more

Secret Sauce - Chicken Katsu, Fried Tofu, Japanese Curry, Macaroni Salad, House Salad. - Japanese Curry Near Me - Upland, California

Wow wow wow is all I can say. Where do I even begin.. I ordered the plate with the katsu chicken, udon noodles, house salad, Mac salad & the Japanese curry for sauce. Hubby ordered the plate with tofu, udon noodles, house salad, Mac salad & the tonkatsu for sauce My son had the katsu with udon noodles bowl & the teriyaki for sauce Me and hubby got the donuts with dip to share The food was AMAZING! I love that me, my son and my vegan hubby all have something to enjoy here the donuts were soooooo good too!! You can tell they're made fresh & the dip goes so well with them. All the food was a hit here! The vibes, energy & layout of the restaurant is so nice & well decorated All that said, the highlight of my review definitely goes to the family that was working. I didn't get a chance to get their names but they were so so nice, helpful and even gave us a complimentary green tea as well as different sauces on the side to try out (all were delicious! ). Their daughter was there and was the sweetest. Our son was getting fussy and she tried to make him smile/laugh. I believe they own the establishment which makes their sincerity & amazing customer service that much more appreciated especially as they were working on a holiday We had an amazing first time experience here and will definitely be returning Thank you guys so much! read more

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Great place I discovered in upland next to sprouts! This isn't the biggest place, but there are some seats inside if you do want to dine in. What I like about it is that they make it simple, you order a base, a protein, you order a sauce and it is $15 just like that. The katsu was crispy and the beef was tender. The macaroni was made different, and wasn't just packed with mayo, so it was quite good. If you are looking for katsu in this area this place should fit the bill. Until next time. read more

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1st timer, wouldn't be my last, the food is so good, place is clean, and price is fair. read more

Secret Sauce - Chicken katsu, rice, veggies, Mac salad - Japanese Curry Near Me - Upland, California

I was finally able to check out this place for lunch. The lady who took my order was very friendly. It's a small and clean place with a few tables, if you decide to eat there. I opted for the "Build your own plate" and chose rice, chicken katsu and house salad. It also came with miso soup. The portion is large, plenty of chicken, crunchy breading, fresh salad. Price was $15, which is okay given the good portion size. Would definitely go back. read more

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Came across this little hole in the wall joint on Yelp. Upon walking in, I was greeted by a lady (possibly one of the owners?). She explained the menu to me, which was kind of self explanatory. I ordered the plate set which comes with miso soup. You can choose your base, which I chose rice. For my protein, I ordered chicken katsu. For my sauce I asked what she would recommend, and she recommended the tonkatsu sauce. And she said I can get one more if I'd like to try, so I ordered the teriyaki sauce. For my 2 salads, I ordered the macaroni & house salad. As I got home to enjoy my food, I went to eat the miso soup first. When I took off the lid, the smell didn't really sit well with me. It had a fishy smell to it (I know there's seaweed in it but it smelt too fishy for just having seaweed). The portion of food did make up for the rating I'm giving. Everything on the plate was delicious. I do wish there was more dressing for the house salad, but i enjoyed the salad. Didn't really care for the tonkatsu sauce as it was a little strong for my liking. The restaurant was pretty empty but it seats a fair amount of people. read more

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Was intrigued by the menu but showed up and it smelled like a chemical factory ... walked out before nausea overwhelmed me. Where's the "no star" button on the ratings scale? read more

On Saturday afternoon I had a fantastic Chicken Katsu bowl. $10 is a steal in California for this volume. The rice did not taste hours old like at most restaurants. The music is played at low volume. Pear Curry Sauce was interesting. The standard Japanese Curry Sauce was actually my favorite for a substantial flavor. The Pear was perhaps second. Can't believe the woman here taking orders today and cleaning the tables. Very pleasant, kind, efficient, like she's from another galaxy where we are not worthy to reside. Best new restaurant for me in a long time. I ate so fast that I only have a photo of curry sauce I dripped. read more

Secret Sauce - Japanese Curry Sauce spilled in haste while devouring delicious Chicken Katsu - Japanese Curry Near Me - Upland, California

Was finally able to try this spot out. Place was clean and inviting, staff members were friendly. For $15 I was able to get soup, my main dish, the base, and two salads. I was curious with the blue sauce so tried it out, it tasted like a fruitier version of a teriyaki. It was good but the curry that I got extra was comfort food for me. The miso soup was a little bland. Overall good value. read more

Secret Sauce - Shrimp tempura plate with blue sauce - Japanese Curry Near Me - Upland, California

honestly such a cute little spot. it was super empty when we went, which made me kinda sad because the service was actually really good. the lady helping us was so sweet and attentive, she made us feel really comfortable. food came out quick and everything was fresh and really good. no complaints at all. they definitely deserve more people coming in, so if you're nearby i'd recommend giving them a try :) read more

Secret Sauce - rice base fried tofu with peanut sauce. - Japanese Curry Near Me - Upland, California

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Great food! I order the chicken katsu and it is delicious. The spicy mayo sauce is also really good. I definitely recommend as it is also super affordable for how much you get and the service is nice. read more

I love this place. The chicken katsu bowl is a great value and the plate set is pretty yummy. It's a must try. I eat here too often. read more

Secret Sauce - Japanese Curry Near Me - Upland, California

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Chicken is good and the portions are reasonable. I haven't had all the sauces but there's a lot of variety. The service was good and the place is cute. read more

I love their chicken katsu. They combo has a lot of food and it's very filling and delicious.

I love this place. I use to live nearby and sadly, no longer do. They are always friendly and everything always seems fresh and made with care and intention. read more

Secret Sauce - Katsu chicken, rice, macaroni salad, fresh fruit. - Japanese Curry Near Me - Upland, California

So good, everything was delicious! My kids & I tried this place on a whim after a doctor's appointment & I'm so glad I stumbled upon it. My kids loved everything. I ordered a plate with chicken katsu, macaroni salad, fruit salad, and peanut curry, as well as a chicken katsu rice bowl with tonkatsu sauce. The portions are a great bang for your buck & the flavors are great. Highly recommend this place if you haven't tried it yourself. Their macaroni salad is slightly sweet but not in an annoying way, it's refreshing & has raisins along with slivers of carrots & apples, I was a little unsure of it at first since I usually hate sweet macaroni salad, but this one is refreshing & everything combined actually works great together, it's not sickly sweet and is perfectly balanced. read more

Been here before and have enjoyed both the food and customer service. I recommend the custom set where you choose your combo selections. The sauces are flavorful, so you can try different ones at different visits and not be bored. Great place for chicken or pork katsu. Worth trying! read more

Secret Sauce - Build Your Own Set - Chicken Katsu, Miso Soup, Fruit Salad, House Salad with Sesame Dressing, Steamed Rice and Peanut Sauce - Japanese Curry Near Me - Upland, California

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I love Secret Sauce. Please go to this place so we can keep it in business. Aside from the staff being super friendly, this place is DELICIOUS. My husband is vegetarian, so he always gets the tofu option. I always get katsu curry chicken. LOVE the fresh fruit side, there is always some kind of yummy fruit options in there. Super consistently delicious - I've gone probably more than 5 times now and love it. read more

This place is really about the sauces. The food at secret sauce is pretty standard but, as the name states, it's all about the sauce. And what a fantastic selection of sauces there were. We tried the peanut, the pear curry, and the spirulina. All of them were delicious, the peanut sauce was incredibly thick and the pear curry had a nice sweetness along with some heat to compliment the curry flavor. What's also great is the owner was kind enough to let us sample a bunch of other sauces and there are enough of them to warrant several returns. You're basically ordering protein, rice, and sauce. Think of it like a bento. Tried the donuts with the pandan sauce, which were ok. Overall, a nice spot for a good, quick meal. read more

Secret Sauce - Tempura Shrimp - Japanese Curry Near Me - Upland, California

Secret Sauce is a hidden gem! The space is small and cozy, but it's clear this place is popular--lots of to-go orders going out nonstop. I had the chicken tonkatsu and it was awesome--crispy, flavorful, and served in a generous portion. The prices are incredibly fair for the quality and quantity you get. What really sets this place apart are the sauces--so many to choose from, and each one is unique and delicious. You can tell they put real thought into flavor here. The staff was fantastic--friendly, attentive, and made the whole experience even better. I'll definitely be back. Highly recommend for anyone craving great food, great service, and serious flavor! read more

Secret Sauce - Menu Board - Japanese Curry Near Me - Upland, California

Food: The food was so good, if it was closer to us this would be our spot. It was all very fresh and hot. So tasty and there were no weird pieces of chicken! It does come in white meat which we prefer!! They have a little water station for you to get water too! Service: The gal who took our order was one of the nicest workers I've met. She was so helpful, we let her know it was our first time and she made us feel so welcomed. Checking on us after she brought us our food. And just making sure we were good! Outside: The parking lot is huge and there is no outdoor seating. Inside: There were a decent amount of tables and they did have a public restroom. When we were eating there were a few gnats that were bothering us. But other than that it was great! read more

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The food is delicious! I got the chicken katsu with curry. Very generous portions at a great price. The restaurant is clean. And the best part was the friendly and excellent service. read more

Nice little Spot!! I purchased pork katsu. It comes with choice of Carb+Protein+salad and fruit and also Miso soup. Pork meat was tender, not overcooked but crispy breadcrumb. 2 layers of meat. Miso soup very tasty. You can choose different type of sauces. I chose Sweet chilli, but they let me try 3 other sauces that also taste amazing. Cashier also nice and helpful. Will come back and try other dish read more

Secret Sauce - Additional (secret) sauces available upon request - Japanese Curry Near Me - Upland, California

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I got the chicken katsu with the japanese curry and it was so crispy and delicious! The sides were yummy too, i didnt expect to like it as much as i did read more

Fully deserving of all of the high ratings. Food felt like home. Very pleasant service and clean restaurant. read more

It was my first time eating in Upland and I'm sure glad I came here because this gem of a spot was waiting for me. I was greeted instantly by one of the friendly owners and my gf + I both got Chicken Katsu sets with 2 fruit salads, house salad, and a macaroni salad. The miso soup came out quickly and was great for that chilly day. The Chicken Katsu sets came out not too long after and I was excited to see how good the food looked despite its simplicity. I had gotten the Pear Curry sauce with my set and my gf got the Tonkatsu Sauce. The owner overheard me talking about wanting to try some of the other sauces next time and was kind enough to offer samples to us! The chicken katsu to breading ratio was great and retained it's crispiness throughout the meal without being too heavy to eat. The fruit salad had a good variety and was all fresh. Macaroni salad was light and had apple bits there which resulted in it tasting more on the sweeter side which I didn't mind. I was able to try my gf's Tonkatsu sauce, Blue Lagoon sauce, Crazy Spicy sauce, and Basil sauce as well. The pear curry was sweet yet savory and paired well with the katsu. The tonkatsu sauce was as expected - tonkatsu sauce but still good. The blue lagoon (my favorite) had some acidity but was tasty when tossed onto the chicken. The Crazy Spicy and Basil sauces were good as well. I'm excited to come back next time and try the other sauces too. This place is quiet but well kept and I hope that they can stick around for as long as possible because it's one of my favorite restaurants given how good the service is, the affordability, and the generous portions of food. Come by and support this small business because they definitely deserve it! read more

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I went to Sprouts and decided to pick up some Katsu at Secret Sauce for lunch. I built my own plate with white rice, chicken katsu with pear curry, house salad, and fruit salad. I really liked the pear curry, it has a sweet taste and made with a coconut milk base. It reminded me of Thai yellow curry. I asked for a sample of the Blue Lagoon sauce, which I was told is made with spirulina. It had a tangy flavor similar to tonkatsu sauce with a little kick of spice and complemented the katsu really well. Really great restaurant and can't wait to come back and try more of the sauces. read more

This place is a small restaurant that took the space from a Mediterranean restaurant. The space was extremely clean with a water dispensary and extremely nice and attentive staff. They inquired about any comments and suggestions we may have had and even provided samples of their wide berth of sauces. As such, in terms of hospitality, this place does extremely well. For the food, I ordered a set of rice, pork tonkatsu, curry sauce, and 2x fruit salad. The set meal comes with an absolutely delectable cup of miso soup, and the white rice was superb. The meat was juicy and tender, but the breading did peel just a little. The fruit salad was just mixed fruit, but it was extremely fresh and I do like fruit. The least impactful part of the set was the japanese curry sauce, which had the components of flavor but lacked the oomph. As my dining companions put it, if it matched the flavors and intensity of Ono's Hawaiian BBQ sauces (which they said the meat was lacking), this place would achieve perfect marks. As it stands, this place achieves a recommend for its tidy environment, pleasant employees, and great food. read more

Secret Sauce - Japanese Curry Near Me - Upland, California