Table 1. Participant demographic information

Classification n (%)
Gender
 Male 171 (57)
 Female 129 (43)
Age
 20–29 years 22 (7.3)
 30–39 years 51 (17.0)
 40–49 years 86 (28.7)
 50–59 years 75 (25.0)
 60–69 years 47 (15.7)
 70 years and above 19 (6.3)
Education
 Junior high graduate 4 (1.3)
 High school graduate 79 (26.3)
 College graduate 62 (20.7)
 University graduate 141 (47.0)
 Master and higher 14 (4.7)
Job title
 Public official 13 (4.3)
 Corporate officer 10 (3.3)
 Full-time employee 89 (29.7)
 Temporary workers 18 (6.0)
 Self-employed and freelancers 41 (13.7)
 Undergraduates and graduate students 6 (2.0)
 Part-time jobs 31 (10.3)
 Homemaker 34 (11.3)
 Unemployment 51 (17.0)
 Other 7 (2.3)
Recently used brands from e-commerce retailers
 Amazon Japan 80 (26.7)
 Rakuten Market 179 (59.7)
 Yahoo! Shopping 27 (9.0)
 Mercari Corporation 7 (2.3)
 ZOZOTOWN 4 (1.3)
 Rakuma 1 (0.3)
 Others 2 (0.7)
Total 300 (100)