Preamble: early weeknight dinner for three
Food: do not come here looking for tapas, AYCE, fusion, etc. This wife-and-husband-run restaurnt is a sashimi and sushi paradise. I suspect because they only open 3 hours a day 5 days a week that standards of food quality can be maintained. The sashimi is delicate, fresh and sliced properly. The ikura salmon roe is transparent and the best that I've had in years. Bluefin tuna was luxurious without being overly fatty (sorry, didn't realize until after that they were endangered)
Service: the wife acts as the waitress and does an earnest and excellent job. The place is small enough that this is manageable and it helps that she is organized, although sometimes simple things like tea takes a long time or a verbal request to refill
Value: look, you will pay more money here but the quality of food more than makes up for it. It definitely can give Ajisai a run for its money, and arguably, is even better.
Ambiance: very small restaurant, comfortable seating and jazz in the background. All tables reserved, people turned away instantly, even when we were the only ones physically present, as reservations are paramount.