The craze for converybelt sushi has generally lead to overcook, cold rice and average at best sushi and sushimi. Kurumaya's converybelt is always packed with fresh, well prepared food; the uni is lovely, the soft shell crab hand roll a staple and there is always a dish that is not your usual “salmon and tuna”. In fact, unlike so many places, I cannot think of a bad mouthful I've ever had here, and I go a lot. Add to this the exemplary service, and it is a place that it is difficult to find fault with.
OK, it is not inventive, it is not going to win Michelin (or even Squaremeal) stars and it is not the cheapest of lunchtime options in the City (a place not known for its cheapness), but it is the best overall Japanese in the City and, like the previous reviewer, Kurumaya has become my canteen.
I'd add too, that I think recently standards have dropped a little. Nothing too serious, but I've started to think that the fish at Ribon, which has clearly upped it's game recently, is fresher, and overall is a better place for lunch.