Quality of service only reason it's not 5 stars. Was really busy and hard to flag down our waitress. In her defense, she was being run ragged on an "all you can eat" special and each table was "sampling", but the sushi chefs were outstanding, and the sushi very fresh and good. I lived in San Francisco for ten years, and worked for a Japanese company, so I would want people to know I was pleasantly surprised, no, I was shocked at how good the sushi was at Sushi Kaya. Just put in your order and don't expect a lot of service