I went to Kasa Moto for a friend's birthday last night and it was only a group of three. Gorgeous rooftop patio and space. The food was just okay - lobster slaw, kasa moto maki, sashimi, black cod, mochi dessert, and the chocolate dessert. All of the food items would be pretty standard quality for any other Japanese restaurant but pricier, nothing memorable.
My biggest complaint was the service. The waiter we had was a young guy who seemed more like a bus boy. As it was someone's birthday, one of the girls brought her a cake. They had given it to one of the servers when they entered. After finishing our ordered dessert, we asked our waiter if he could get the cake. After 15 min, still nothing so we reminded him again. Turns out he forgot. When he finally brought it back, he places the box on the table without anything else. The whole point was to have the cake with her for her birthday. We asked him for plates and he responded with "i don't know if that is allowed. Let me check" I get that you dont want people to bring their own desserts but we ordered dessert on the menu in addition to several drinks per person. It was obvious that it was a special occasion. The server after several minutes returned and said it was okay, had to ask if we needed forks - again, isn't that obvious?! And he wanted to make it clear that they would normally charge a plating fee but graciously would not this time - communicated in an annoyed tone. None of this was communicated at the start of the seating when we brought them the cake. The restaurant was clearing out at that point so we weren't hold up a table. Overall attitude was terrible and not condusive to providing a great night for our birthday girl!