Kopan's bentos are worth the price for how much you get out of it in person. I think I paid $17-18…read morefor my meal below and it was so filling that I had my boyfriend finish the rest of it. After a long day and no energy to cook, this definitely hit the spot! I always love to sit in the little nooks or booths because it's such a vibe. Dimly lit and intimate. Staff are always polite and accommodating, greeting us when we arrive and depart, adding to why I like this place. 10/10 workaholic and boyfriend approved!

I've come to Kopan for what seems like years now. It's had…read moreits up & it's had its downs. The menu changes more often than not. Prices fluctuate and go up. Proportions getting smaller, salads getting bigger. Promotions that don't really promote any kind Of savings Recipes get adjusted. All that typicall recession economy idicators. But it's always been a viable option for some good food. But today I was shocked by how empty it was on a Thursday at 3pm. Something seemed off. I wondered because the service is quick and the staff is nice. Our appetizers were great no issues there. But apoun tasting my ramen it became more obvious to me why this place fell off and didn't have a soul inside. The tonkatsu ramen here use to be DELICIOUS. An experience of flavors and textures it was like cooked for 16 hours or something like that but idk if they got rid of that ,for some reason today my ramen was just bland and flavorless and not that hot and the meat was a little undercooked for my liking. I typically don't like to add too many condiments or chili oil to my ramen the broth alone should be able to stand on its own but it just did not. It was lowkey kinda nasty. And the noodles didn't help. And if I recall the last few times I've been here I recalled the same issue. The sauce on the teriyaki chicken was almost gelatinous. It looked like snot, it had this strange texture. I've never tasted something so gross. It Tasted worse than it looked and it looked terrible No joke. I hope they're able to fix these things because it's such a staple. This place really needs to get it together like how it was in 2016-2019! Those were some good times here!

pretty good service and good food too. the ramen is decently portioned and tastes good. great local…read morelate-night spot

Awesome service from Shane and friendly staff. Food is great and affordable. Clean and spacious…read moreinterior. Will definitely come back and recommend with family and friends.

Just an amazing restaurant. Been here twice and the owner has provided complimentary food both…read moretimes. Great atmosphere and amazing service. Could not recommend a place more

The food was amazing the wait was a little long but it was worth the wait even the service was…read moregood. Love this place

It's been a few years so decided to stop by What's up men to pick up a lunch combo to go. Same…read morespot, same friendly service and same good eats. I opted for the kuro lunch set - which comes with tonkotsu ramen and I chose a fried rice for my side. The ramen was oh so good - it's not too garlicky but rich pork flavor. The noodles are nice and eggy and the cha shu is perfectly tender and that egg.. so yummy! And the fried rice hit the spot. They make my fav fried rice in so cal. All in all.. still a solid spot for ramen.

I love What's Up Men! A group of friends and I came in not too long ago and the service was super…read morefast! My only grievance is the takoyaki is overly sweet. I love takoyaki and get it whenever i see it on a menu, so i was excited to share it with my friends who had never tried it before. When we tried it, however, it literally tasted like an octopus donut hole, and my friends were looking at me funny for even ordering it. I was so disappointed since I was super excited to even see it on the menu as I hadn't had it since being in the bay area for school. Aside from that, the ramen is great and comes out really fast, and the servers are all super on top of it every time i've come in. I honestly would recommend this place to anyone in the Fullerton area, especially students looking for a late night meal.

My friend had been here before and convinced me to give it a try, and I'm glad I did! The food…read moredefinitely did not disappoint. For the price, the portions were generous and everything we ordered was delicious. We had the ramen, chicken katsu, and Korean chicken wings in two flavors--sweet & spicy and soy garlic. Both flavors were so good! Our server was very friendly and professional and always had a smile on their face, which made the experience even better. The place is a little small and parking can be limited, but the atmosphere is warm and welcoming. We really enjoyed our dinner and will definitely be coming back!

We got the wings in soy garlic, sweet chilli and Korean spicy and they were all really good! The…read moreKorean spicy one was spicier than I was expecting. The curry was good, I've had better, but satisfied the craving. Also took a sip of my friends ramen broth and it didn't taste super authentic but was still good. I would probably try more of the Korean dishes rather than Japanese dishes here next time. It's interesting that they serve both full menus.

Good service and good food, clean environment. Nice and…read morefriendly staff. The food is really nice with a fair price

Great eating spot for family. They also offer bỉthday celebration. Highly recommendedread more

Tried this ramen spot and it definitely hit the spot. I got the spicy miso ramen, and it was really…read moregood--nice rich broth with a solid kick to it. They even gave extra spice on the side, which was awesome because I could adjust the heat exactly how I wanted. The noodles had a good texture, and everything just came together really well. It felt like a super comforting bowl without being too heavy. Overall, really solid ramen and I'd come back for sure, especially if I'm craving something spicy.

I could overlook the bare minimum service and overly salty but still somehow bland ramen…read more But we were charged more for each item than the menu price dining in. Some by a dollar or more for each item. There was also a service charge added to the receipt. After the charge posted to my card, they added additional money to the tip which finally made me decide to leave a negative review which I hate doing. There were two other people dining in and they had to go up to the register to get anything from the server and eventually just left before ordering. We should've did the same. Waste of money and shady. CHECK YOUR RECEIPT!

Recommend using the Yelp Waitlist feature to get a good idea of the line. It can get busy during…read moremain dining hours, especially since the dining area is pretty small (seats like 30 total?) Parking is a little weird (half the space in front is handicap/bank parking) so look around if you have to. Usually it's fine though. Food here is great, and it's why I come here! Gyoza is crispy and juicy and hot. Ramen noodles are all unique and more of that handmade vibe. We got the mentaiko ramen and green chili shio ramen. If you want a less fatty broth, then shio is your choice. Savory and creamy? Pretty much anything else. Always a good time here

This review hurts, because I have relatives who are related to the owners in Kitakata Japan. I've…read morebeen to Bannai Shokudo in Kitakata, the mothership of the franchise. A few months ago my wife and I wanted to eat at Kitakata Buena Park. We understood there would be a wait. What we could not bear was the strong, revolting smell of sewage wafting through the parking lot just outside the restaurant. The smell had nothing to do with the restaurant. The smell came from a sewer line somewhere in the vicinity of the restaurant. Be that as it may, we left about five minutes into our wait. I knew that waiting any longer for a seat inside the restaurant would result in my wife and I eating our meal with the stench of sewage tainting every slurp and every bite. The problem is a city sewage problem, but Kitakata bears the burden. Please let me know the problem has been addressed by the city and I will return.

Food was very delicious! Staff is very kind! And i felt very welcomed here! Will come again and I…read moreencourage everyone to! I LOVE UBU UBU!!

The food was amazing, me and my daughter have gone twice and never disappoints. The flavor is…read moreamazing. The people who are helping you and taking orders, suggest there new items and can never go wrong with that. This place is for anyone who loves Korean food or ramen! Recommend the cup baps or the onigiri

I love coming here. I always get the seared salmon and Mr…read more satan. Their spicy edamame is also good. Probably the best I've had. The customer service is also exceptional.

Ordered pick up from here. We ordered the tonkotsu ramen, the spicy miso ramen, and the tempura…read moreCalifornia roll. I enjoyed my tonkotsu ramen. The noodles were good texture and I enjoyed the broth. The spicy miso ramen wasn't spicy and my fiancé thought it was subpar. The tempura California was really disappointing. The avocado was completely black. I understand it's a tempura roll, but I don't think that's the color it should be. It tasted old. I'm not sure if we'll stop here again, especially considering the price. It was disappointing because I really wanted to like it, but that roll just didn't seem right.