From Jan 2000 data, the survey includes agricultural, forestry and fisheries households, unlike previous surveys that excluded them. Therefore, the break in the data should be considered for historical analysis. Households nominal spending. The survey unit is the household in the entire area of Japan.The following households are, however, excluded as inappropriate households: a. Households engaged in agriculture and cultivating 10 acres of land or more (inHokkaido 30 acres or more) b. Households engaged in forestry c. Households engaged in fishery One-person households, d. Households which manage restaurants, hotels, boarding houses or dormitories, using their dwellings e. Households which serve meals to boarders even though not managing boarding houses as business f. Households with 4 or more living-in employees g. Households whose heads are absent for a long time h. Foreigner households