| Population | Japanese Nationals Aged 20 and Over |
|---|---|
| Sample Size | 787 |
| Sampling Method | Stratified Two-stage Probability Sampling Methodi80 points, 15 sample per point) |
| Survey Method | Face-to-Face Interviewing Method |
| Research Term | 2002/11/14-12/8 |
| Completed Questionnaires | 65.6% |