Abstract: A heating apparatus includes a heating circuit configured to heat a product to be heated; a door; a door lock mechanism configured to lock the door with the door closed; and a processor configured to control the heating circuit and the door lock mechanism, wherein based on an indication of a heating time period and a “settling” time period, the processor causes the door lock mechanism to lock the door, with the door closed, from a beginning of the heating until an end of the “settling” time period.

Abstract: A frozen sushi pack includes: a container; and a plurality of sushi pieces arranged in the container. Each of the sushi pieces includes: a shari rice base; and a neta topping. Using a water content per unit volume ranging from 55% to 65% as a reference value, the sushi pieces in the container are classified into: first sushi pieces of a first group in which the neta topping contains a water content below the reference value; and second sushi pieces of a second group in which the neta topping contains a water content equal to the reference value or above.

Abstract: A heated product sales system includes a first apparatus configured to heat and cook a product; and a second apparatus configured to suspend a sale of the product until a certain time period has elapsed after the heating and cooking.

Abstract: A heating apparatus includes a heating circuit configured to heat a product to be heated; a door; a door lock mechanism configured to lock the door with the door closed; and a processor configured to control the heating circuit and the door lock mechanism, wherein based on an indication of a heating time period and a “settling” time period, the processor causes the door lock mechanism to lock the door, with the door closed, from a beginning of the heating until an end of the “settling” time period.