Sakanaya, which means "Fish Market," in kanji is pretty amazing. It opened last week. I was in today for the first time. The owner said he worked as a cutter at Tsukiji for 10 years and then as a buyer for 10 years for a wholesale fish supplier to Japanese restaurants in Boston. What he showcased today were many varieties of sushi grade products: blue fin, big eye, and albacore tuna; buri; hamachi; etc. The unagi is from China; not worth the thrill of dioxins, but his fish? Absolutely the best I've seen on the East Coast, bar none. I was in Tokyo yesterday. This guy? This guy rocks. He's at 75 Linden Street in Allston. It's expensive, but worth it.