Shinagawa ward conducted a survey about students' lives. The targets of survey are families that have 2nd grade student or 9th grade student. In the survey, the ward asked "What Time Does Your Mother Come Home?"
Here is the survey result.
Table: What Time Does Your Mother Come Home? (in Shinagawa Ward, Tokyo)
|My mother comes home||2nd grade students||9th grade students|
Source is Shinji-shimbun leaflet Vol. 404 published by a local assembly member, Shinji Takahashi.