Just got back from lunch at Sakanaya. For $16.70, I had fresh sweet shrimp and tuna sashimi (about 3 orders), a toro "bowl" with rice, avocado and scallions, and pieces of Eel, Yellowtail and Fluke sushi.
This place is about as authentic as it comes vis-a-vis Japanese markets. Its in Allston at 75 Linden Street, and worthy of a try for anyone who is remotely educated about sushi.
The owner used to work at Japan's primary fish market and sells sashimi grade fish for a fraction of what it would cost to eat at a restaurant. Moreover, he'll slice it and provide it in a take out container for you, complete with shredded radish, ginger and wasabi.
A really great experience I felt that I had to share.
170 Brighton Ave, Boston, MA 02134
75 Linden St, Boston, MA 02134