Four of us ate at Oga last night. Ordered the $45/person omakase - both sashimi and sushi, a bottle of dai-ginjo sake, and finished off with some noodles an oyako ochazuke and chawanmushi. Certainly a very expensive treat on a special occasion (my brother and his wife were over from Paris).
The sashimi was the showcase, as it should be. They didn't have some specialties that I've had there before like awabi (abalone), but they more than made up for it with other special items like california Sea Urchin Roe, and Aji - made into a tataki with the bones grilled up on the side (crunchy and tasty!). The obligatory o-toro was real belly o-toro - just absolutely melt your cheeks off quality. The hirame was paper thin - there is some real skill behind that sushi bar.
I had hoped for some more simple "after drinking" type items - the stuff you get in the NYC Japanese businessman places (cha-han, ramen, plain zarusoba) but we managed with tenzarusoba and the oyako ochazuke with lots of salmon and salmon roe.
A very tasty, authentic Japanese night out. Not everybody there is Japanese, but the management and the sushiya's are. They are experienced - I'd put some of their sashimi preparations up against the best I've had in private businessman places in NYC.
The sad news from my Parisian brother is that Paris is as overun by the commodity korean/chinese run sushi places as we are. Real Japanese places are as few and far between as they are here. Globalization and the easy access to mediocre stuff marches on... quel domage.