PURPOSE: To obtain a preserved instant solid principal food, eatable without using a fuel, and having a high calorie and nutritive value, by vacuum drying specific amounts of semipolished rice, MISO and sardines, pulverizing the vacuum dried semipolished rice, etc., adding a coarse flour of a vegetable in a spcific amount to the resultant power, and roasting the resultant mixture in an oil at a specific temprature to give a cracker.

CONSTITUTION: About 220g semipolished rice such as rice harvested this year, old rice or rice after two years, 3W9g MISO and about 30g sardines are vacuum dried to give flour, and about 20W80g coarse flour of a vegetable is added thereto. The resultant mixture is then roasted in a vegetable or animal oil at about 100°C to give a cracker or Japanese cracker (preferably a set of three round Japanese crackers or foldable into three by forming longitudinal two folding lines thereon).

EFFECT: Eatable either by dipping in water or as it is without requiring a side dish.