Ageus T.
Yelp
Authentic, that's how I would describe Itsumi.
I've been to two sushi places recently, Inari and Itsumi. And while Inari was good, Itsumi has the best sushi I ate in Istanbul so far. It's one of the only places to have gotten the texture of rice just right. I didn't fall in love with every single roll we had ordered on the 30 piece 115₺ sushi platter, but for the most part, it was great, especially the dragon and crunchy roll were heavenly.
The menu is authentic, you won't find your beef sushi roll here like other Japanese restaurants which create rolls specifically catered for the Turkish palate. The friendly and attentive staff is authentic, talk to each other in Japanese, there is even a Japanese waitress, so while I didn't particularly like the decor, this place is the most authentic Japanese experience I've ever had in Istanbul. No wonder that Japanese people frequent here.
And as far as pricing goes, it really isn't that expensive for a Japanese restaurant of this quality. Certainly not a cheap meal, but if you ever find yourself in Kanyon craving for some sushi, do not, for the love of sushi, go near SushiCo and torture yourself with that atrocity, you deserve better, your stomach deserves better, just go out, walk for a little, and find this place. Your stomach will thank me.
However there are a few minor points. They don't serve real wasabi but horseradish like most other places, unlike Inari, which does serve the real deal. The green tea ice cream was too bitter, again Inari is better in this aspect. But this is just nitpicking.