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I don't say the latter lightly - if you're going to eat raw scallops or sashimi, you need to be confident of the kitchen's sourcing. I'm often frustrated by diners who complain about the prices at their local Japanese restaurants - sushi grade fish and shellfish does not come at a knockdown price.
We eat in Tsunami so often that the staff know exactly what we're going to order, which water each of us have, and which wine we're likely to prefer. As a result, it's very easy to become complacent about what's being put in front of you. This week as I was taking the 10yo too, I thought I ought to pay attention and attempt to write it up!
So, to begin with, it being a Japanese restaurant, there's always edamami (the soya bean in it's pod). This were crisp, hot, and had a good sprinkling of salt.
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Next we had truffle rib-eye with exotic mushrooms and truffle sauce. The rib-eye is ordered to your taste, and comes on a bed of creamy moreish leeks. The mushrooms are cooked in a heady reduction spiked with truffle oil... The whole dish is then topped with a pile of what looks like saffron, but is actually shredded chilli's. This isn't perhaps what you'd expect in a Japanese restaurant, but actually with all your umami bells ringing already, it fits right in, the rich earthy depth packing a punch after the delicate fish.
I love Tsunami, I must do, I eat in there all the time. Okay, it's not Nobu, but it's not trying to be... Therein lies the problem. Some diners feel it should be Nobu at these prices, but it's the food you're paying for, not the location! Ultra fresh fish and ingredients cost the same, no matter your post code. It's a bit like my review of the Hand & Flowers - would I recommend you cross town to come here? Perhaps not (though the sister restaurant in Charlotte Street may be closer to you). If you're local, and want to eat consistently good Japanese, absolutely. It's not the sea urchin wielding kind of Japanese some like, but it's lip smacking good, I really look forward to eating it, and I know exactly what I'm having next time!
Other dishes which are equally good:
Chicken gyoza - deep fried chicken parcels
Gin dara - blackened cod in miso sauce
Shrimp tempura roll
All of the sashimi (!)
Grilled scallops with masago & creamy spicy sauce, which is flambéed and brought to the table - very pretty with high blue flames! (Masago is capelin roe, similar to tomago (flying fish roe), but slightly larger in size).
Tsunami Restaurant
5-7 Voltaire Road
Clapham
London
SW4 6DQ
T. 020 7978 1610