Survey period : From February 4 to March 9, 2026. Population of the Survey : Individuals living in Japan who are at least 20 years of age. Sample size : 4,000 people (2,030 people [i.e., 50.8 percent of the overall sample size] provided valid responses to questions). Sampling method : Stratified two-stage random sampling method. Survey methodology : Mail survey method (responses collected by mail or via the internet). {table} (full story)