RE: Japanese in NY near the Met
Do you mean the Metropolitan Opera House, or The Metropolitan Museum of Art? "The Met" used to automatically mean the museum.
The museum is on the Upper East Side. TOKUBEI 86 on 86 betw 1&2 is really great and a better value than the more popular places like SUSHI OF GARI.
The opera house is on the Upper West Side. You can head to MASA in the Time Warner Center for a paltry $400 prix fixe per person. If you don't want to drop a grand on dinner, I recommend HARU on Amsterdam and 80.
P.S. If you want to find the Fairway grocery store, you need to head UP on Broadway, not down.