Excellent Japanese cuisine with an interesting compromise to Catalan taste --if you like the idea, try the crab-stuffed calamari or fried egg w/ foie. They are also great with the classics and make one of the best tuna tartares in town.
On the not-so-good side, the place is really small (5 tables, literally) so it's best to go in parties of 2-3 and sit at the bar. Reservation is a must. Don't be deterred by the owner's attitude. She means well, but just gets lost in translation sometimes XDD