This place is fantastic. I want to write that again and again to stress that this place has to be visited.
The place is not easy to find, I had known about it for some time and even walked past it a number of times before I realised where it is. On the ground floor is a sushi bar and just a few chairs and downstairs there are a few tables, not many, maybe eight or nine. The decor is very simple and the staff, all japanese are very nice.
We ate so well, a tuna tataki with truffle was superb, well executed and fresh. King crab in a taco (the best way i can think of to describe it) was a revelation, very fresh and clean and tasting of exactly what it was. Sushi and sashimi was all perfectly executed and again fresh. Then came Wagyu beef, wow. At first there was a mistake and they brought it well done, but the waiter quickly promised to replace it with some rare meat, as ordered. He then brought over some Wagyu tataki to keep us amused while we waited. Superb flavour and texture, unlike any other beef. The rare rump of beef followed and delivered on all fronts: flavour, texture, perfect cooking and it was £16 for 200g, so cheap especially compared to £65 at Zuma.
When I come accross a gem like this I want to tell everyone because this place deserves to do very, very well. Please go but just don't take my table.