2025 Volume 76 Issue 4 Pages 153-161
Despite decreasing waste generation in Japan, the capacity of landfills is also decreasing, leading to an ongoing challenging situation. Reducing household waste is crucial in order to reduce CO2 emissions. To do this is necessary for individuals’ behavior to change. This study examined consumer behavior and awareness of household waste to explore waste reduction possibilities using a workbook that utilizes insights based on nudge theory.
We asked 70 students to weigh their waste for one regular week. Over the following two weeks, we conducted waste reduction seminars and instructed them to measure their waste with a focus on reduction. A questionnaire survey was also administered.
The survey revealed a 29% reduction in household waste, with combustible waste decreasing by 33%, food waste by 15%, paper by 31%, and plastics by 25%. The questionnaire survey indicated improvements in waste separation behavior, as well as increased awareness and practice of waste reduction. Moreover, there was a growing prioritization of waste reduction and the environment over cost and convenience. These findings suggest the potential to reduce household waste through enhanced awareness and waste reduction practices via education.
