About
Koisan Japanese Cuisine Restaurant located in Orange, California is a sushi restaurant with an extensive menu of traditional and innovative dishes from Japan and Southeast Asia. The restaurant provides a comprehensive dining experience that includes both unique entrees and desserts with an array of alcoholic and nonalcoholic beverages. As a sushi-focused restaurant, Koisan sets itself apart from other Japanese restaurants in the area with its distinct menu of carefully crafted sushi rolls. Customers can enjoy a variety of fresh seafood presented in a creative fashion, including house specialties such as crunchy spring rolls, deep-fried shrimp tempura, and tekka maki. Furthermore, Koisan provides attentive service and unique ambiance to enhance the dining experience.
Ratings for Koisan Japanese Cuisine Restaurant
Boosted accuracy with combined honest ratings!
- Overall Rating
google 
yelp 
grubhub 
facebook 
tripadvisor 
opentable
Reviews for Koisan Japanese Cuisine Restaurant
We only show the 3 most relevant reviews to save you time.
They dont make places like this anymore with Japanese layout and design. Excellent service, food quality from fish to tempura, just excellent. Clean environment and good prices
When we arrived there were 7 empty seats at the sushi bar and no one waiting in front of us but the wait to sit there was 15 minutes. Don't understand why and the draft beer was warm and flat. This place has some serious issues. Redeeming qualities: the sushi portions are big and the fish is fresh. Still don't think I'll be back.
My family and I have been coming to Koisan for over 5 years. Food is delicious but service has always been bad. Every time we came to eat, the restaurant wasn’t busy and we had to wait a long time for our food to be served. Servers often messed up our order, and we had to wait a long time just for an appetizer as simple as edamame to be served. I’m so disappointed and unfortunately we will not be coming here anymore. To the management: your chefs are amazing but service terrible. You have to be more selective when hiring servers because they are representing your restaurant.
Photos
Business Hours
| Sunday: | 3:00 PM - 9:30 PM |
| Monday: | 11:30 AM - 9:30 PM |
| Tuesday: | 11:30 AM - 9:30 PM |
| Wednesday: | 11:30 AM - 9:30 PM |
| Thursday: | Closed |
| Friday: | 11:30 AM - 9:30 PM |
| Saturday: | 12:00 PM - 9:30 PM |