Center for Social Research and Data Archives

Project Objectives

Survey Overview

JLPS for the youth group (JLPS-Y)

The youth panel survey is based on questionnaire research, and focuses on male and female residents in Japan aged between 20 and 34 in 2007. The questionnaire research was conducted in January through March, 2007. The respondents were selected from the Basic Resident Registration through a stratified sampling method based on age and gender.

Due to expected difficulties in collecting responses from young people, we further stratified the sample based on age through the three age groups 20-24, 25-29, and 30-34 in order to adequately represent young people of both genders.

We mailed a questionnaire package to each of the potential respondents, along with a note stating that the respondents would also be requested to participate in follow-up surveys. Subsequently, staff from a survey company collected the completed questionnaires by visiting the respondents individually. We collected 3,367 cases with a response rate of 35%. The respondents have been followed up every year since the survey began.

Because the respondents drop out of the survey as the survey continues, we drew a new sample of people with the same age in 2011 (aged 25-39 in 2011) from the Basic Resident Registration using the stratified sampling method based on age and gender. We mailed out questionnaire packages and asked the respondents to return them by mail. We collected 710 cases with a response rate of 32%. The supplementary respondents have been followed up every year since 2011.

In 2019 the respondents became 32 to 46 years old, and we decided to sample the youth (20 to 31 years old in 2019) who are not covered by the survey. The refresh sample was drawn from the Basic Resident Registration using the same stratified sampling method used in 2007. We mailed out a questionnaire package, and staff from a survey company collected the completed questionnaires by visiting the respondents individually. We collected 2,049 cases with a response rate of 31%. These respondents have also been followed up every year since 2019.

JLPS for the middle-aged group (JLPS-M)

The middle-aged panel survey is based on questionnaire research, and focuses on male and female residents in Japan aged between 35 and 40 in 2007. The questionnaire research was conducted in January through March, 2007. The respondents were selected from the Basic Resident Registration through a stratified sampling method based on gender.

We mailed a questionnaire package to each of the potential respondents, along with a note stating that the respondents would also be requested to participate in follow-up surveys. Subsequently, staff from a survey company collected the completed questionnaires by visiting the respondents individually. We collected 1,433 cases with a response rate of 40%. The respondents have been followed up every year since 2007.

Because the respondents drop out of the survey as the survey continues, we drew a new sample of people with the same age in 2011 (aged 40-45 in 2011) from the Basic Resident Registration using the stratified sampling method based on gender. We mailed out questionnaire packages and asked the respondents to return them by mail. We collected 253 cases with a response rate of 31%. The supplementary respondents have also been followed up every year since 2011.

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