Food-related activities account for 12% of Japan’s greenhouse gas emissions, making consumer-level reduction essential for achieving carbon neutrality by 2050. While various initiatives have attempted to raise awareness through databases, educational materials, and outreach events, these efforts often lack systematic integration and fail to address consumers’ primary concerns of taste and health alongside environmental impact. This study developed an integrated approach combining a comprehensive CO2 emission database with two educational tools: “Food Design Cards” that enable calculation of both emissions and nutritional balance and a “Tangible Food Design Game” that translates invisible emissions into physical weight. Through five workshops engaging 176 participants from preschool children to adults, we demonstrated that over 80% of participants improved their understanding of food-related CO2 emissions, with 90% finding the tools engaging. However, only 33% expressed immediate intention to change purchasing behaviors, revealing a persistent awareness–action gap. Our findings validate the effectiveness of integrating environmental data with health and taste considerations while highlighting the ongoing challenge of translating awareness into behavioral change. This research provides a framework for developing engaging environmental education tools that can contribute to consumer-driven emission reductions in the food sector.