Welcome to the paradise of the nigiri... and of the number 15. In Sato i Tanaka, they fit 15 people. The lunch menu does not go up from 15 euros. And the most important thing: each one of their famous nigiris has 15 grams of fish. The 12 grams of rice complete the sum of 27 grams, the exact weight of each nigiri in this restaurant in the northeast area of Barcelona's Eixample. Ryuta Sato and Aki Tanaka are in charge of making you feel at home, although, if you are lucky, you can even meet Kenji Ueno, the restaurant's boss. If you are a fan of Japanese food, you will have seen (or, if you are lucky, even been to) those classic tokyo bars where an itamae serves the customers. That is the spirit of Sato i Tanaka: you cross a door... and you feel in Japan. The cooks work in full view of the customer, impressing each knife they give to the different pieces of fish. "We dispatched some 290 pieces of sushi", they once revealed to the Spanish newspaper El Periódico. This is their speciality, but if you prefer, you can also choose dishes such as steamed monkfish liver pate or grilled cuttlefish. The cards are laid: let's play.