Japanese food makers are rolling out easy-to-prepare food products for children age 1 to 6, though the population in the age bracket is continuing to fall.With their frozen side dishes for lunch boxes and food sales services including at nursery schools, companies are trying to meet growing demand for quick meal solutions that reflects an increase in double-income households. Products that prioritize aesthetics and nutritional balance are particularly popular.In March, Ajinomoto sold online its 'Pitamo' set of frozen side dishes for children on a trial basis, aiming for commercialization. At a price of about ¥680 per set, including shipping, all 1,200 sets that had been prepared sold out on the launch day.