A fun, but expensive, high-end sushi tour would travel in an arc from Kyo-ya to Ozumo to Sushi-ran. I recently ate dinner at Ozumo "omakase" and had a very impressive "cavier special." Think of Ikura shushi, rice with a cylinder of nori and filled with salmon roe. Now add Albacore Tuna roe and Hallibut roe and change the strips of nori to very thin slices of Albcore Tuna, Salmon, and Hallibut each paired with the cavier. Was very impressive and very good. If you are very familiar with Japanese and Japanese food (or if you are willing to try something different), try Kappa. This place, located on Post in Japantown above the Denny's, is a "koryori" establishment - essentially a Japanese Tapas Bar. But, it is very elegant (Mrs. Kimura, the hostess is kimono clad) and a bit exclusive (no sign). Great food and hospitality. If you are up for some Japanese home cooking, you can't possibly do any better than have a meal at Minako (Mission between 18th and 19th). Billed as "Organic Japanese Cooking" it is a daughter/mother shop with really really good and reasonably priced food with super friendly service.