What does an $800 sushi box look like? Chef Masayoshi Takayama — the head of three-Michelin-starred Masa, the most expensive restaurant in the country — launched such a box set last month, part of a delivery program due to the shutdown of his luxe restaurant in the Time Warner Center.

Masa takeout is not on Seamless, Caviar, or even the higher-end reservation system, Tock. There are only 20 boxes per week, each designed to feed four people, and orders are