1. The time required for taking luncheon was investigated on 2200 subjects of college girls who were from 18 to 20 years old, from June to December in 1972. The results were as follows.
2. When rice, rice mixed with vegetables etc., bread, and noodle were served as a staple food, they required longer time to have them in the order of noodle, rice mixed with vegetables etc., rice and bread than the others.
3. Girls who attend school from their own house and lodgers were generally slow eaters (avarage, 14 minutes and 8 seconds), but college house boarders ate a little quickly (avarage, 13 minutes and 47 seconds).
4. The frequency of the subjects required 15 minutes, 10 minutes and 20 minutes for eating food was 50 percent, 24.2 percent and 10.8 percent, respectively. Eighty five percent of them ate the luncheon up within 15 minutes.
5. The time required for eating varies remarkably by their individual differences and their habitual foods and their living factors. Above all, the difference by habitual foods was the most remarkable factor.

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In 1904, the first restaurant in Japanese department store appeared at Shiroki-ya department store. Since then, other department stores had opened up restaurants in their stores. Because there were so many calls for restaurants in department store, they grew bigger and got diversified. In 1930, Mitsukoshi department store started to serve okosama-lunch. It was a reflection of the customers in those days which was formed by the new-middle class. Department store made their grocery section extended especially after the great Kanto Earthquake. As the grocery section extended its new from selling food products at reasonable price to gifts and souzais, many department stores had started food manufacturing on their own. As a result of them, some problems had arisen. One of the problems was discharge of scrap; the remains of a meal wash. There is indication in the report of Tokyo City in 1930 that department stores new discharging scrap heavily. While the restaurants were these certain classes, the grocery section of the department store was targeting various classes of customers. The facts tell us that food section of department store in modern Japan played a part in the change of eating habit, while made multiplexing at once.

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