List of Survey Items
| 1st survey | 2nd survey | 3rd survey | 4th survey | 5th survey | 6th survey | ||
| Caregiver | ○ | ○ | ○ | ○ | ○ | ○ | |
| Family members living together | ○ | ○ | ○ | ○ | ○ | ○ | |
| Visits to grandparents’ houses | ○ | ||||||
| Sensitivity to the dwelling | ○ | ||||||
| Moving and extension to houses | ○ | ||||||
| Dwelling type | ○ | ||||||
| Housing environment | ○ | ||||||
| Status of pets | ○ | ||||||
| About parents | |||||||
| Changes from birth to the present | ○ | ||||||
| Employment status | ○ | ○ | ○ | ○ | ○ | ||
| Company size | ○ | ||||||
| Occupation | ○ | ||||||
| Status of leave of absence due to child care | ○ | ||||||
| Wakeup time and bedtime | ○ | ||||||
| Working hours | ○ | ○ | ○ | ○ | |||
| Commuting time | ○ | ||||||
| Time to return home | ○ | ||||||
| Mothers' absence from home due to employment reasons |
○ | ○ | |||||
| Fathers' absence from home due to employment reasons |
○ | ○ | ○ | ○ | ○ | ||
| Educational background | ○ | ||||||
| Division of childcare and household chores | ○ | ○ | ○ | ||||
| Fathers on their day off | ○ | ||||||
| Eating habits | ○ | ||||||
| Way to have contact with children | ○ | ||||||
| Time spent with children | ○ | ○ | |||||
| Smoking | ○ | ○ | |||||
| Income | ○ | ○ | ○ | ○ | |||
| Monthly child-rearing expenditure | ○ | ○ | ○ | ○ | ○ | ○ | |
| Monthly child-care fee and tuition fee | ○ | ○ | ○ | ○ | ○ | ||
| Expenses for paid lessons | ○ | ||||||
| Burden of child-rearing expenditures | ○ | ||||||
| Particular points of care during child rearing | ○ | ||||||
| Satisfactions from having/rearing the child | ○ | ○ | ○ | ○ | ○ | ○ | |
| Burdens of having/rearing the child | ○ | ○ | ○ | ○ | ○ | ○ | |
| Concerns and worries about child rearing | ○ | ○ | |||||
| Whom to ask for advice about child rearing | ○ | ○ | ○ | ○ | |||
| Reason(s) for not asking for advice | ○ | ○ | |||||
| What kind of child you want him/her to become | ○ | ||||||
| Breast milk | ○ | ||||||
| About the child | |||||||
| Rules about meals | ○ | ||||||
| Particular points of care at mealtime | ○ | ||||||
| Particular points of care concerning health | ○ | ||||||
| Eating behaviors | ○ | ||||||
| Concerns about eating behaviors | ○ | ○ | |||||
| Rules on giving snacks | ○ | ||||||
| Discipline status | ○ | ||||||
| Response to bad behavior | ○ | ||||||
| Wakeup time | ○ | ○ | ○ | ○ | |||
| Breakfast time | ○ | ||||||
| Lunch time | ○ | ||||||
| Snack time | ○ | ||||||
| Dinner time | ○ | ||||||
| Bedtime | ○ | ○ | ○ | ○ | ○ | ||
| Bedwetting | ○ | ||||||
| Nap status | ○ | ○ | |||||
| Bathing status | ○ | ||||||
| Attendance at nursery school/kindergarten | ○ | ||||||
| Living behaviors | ○ | ||||||
| Playmate | ○ | ||||||
| Playmate (frequency of play) | ○ | ||||||
| Favorite play | ○ | ○ | |||||
| Usual play areas | ○ | ||||||
| Play areas (frequency of play) | ○ | ||||||
| Worry about play areas | ○ | ||||||
| Particular points of care concerning children's play |
○ | ||||||
| Friends of similar age in the neighborhood to play with |
○ | ||||||
| Playing with other children | ○ | ||||||
| Worry about the relationship with friends | ○ | ||||||
| Hours spent watching TV | ○ | ○ | ○ | ○ | |||
| Watching TV | ○ | ||||||
| Hours playing computer games | ○ | ○ | ○ | ||||
| Character | ○ | ||||||
| Children’s way to have contact | ○ | ||||||
| Lessons | ○ | ○ | ○ | ○ | |||
| Things the child could do presently | ○ | ||||||
| Children's behaviors (adaptation to communal life) |
○ | ||||||
| Help | ○ | ||||||
| Illnesses and injuries | ○ | ○ | ○ | ○ | ○ | ||
| Accidents | ○ | ||||||
| Height and weight | ○ | ○ | ○ | ○ | ○ | ||