Studies of time for domestic life in 32 housewives in Kanagawa prefecture were done on February, 1951 They fell into 4 groups according to whether they have babies and infant or not.
Time spent in house hold works is about 8 hours on weekdays and 65 hours on Sunday, It is longer in A group (large families with babies and infants) than in B group (large farmilies without babies and infants) and C group (small families without babies and infants).
There average energy expenditure estimated from the above data is about 1700-2000 calories a day and is highest in A group among them. There is no difference between weekday and Sunday in each group.