In this paper, we develop and evaluate a diet awareness support system using a cell phone camera. Our system supports to become aware of issues in diet and contributes to changes in attitudes and in behaviors related to the diet. The distinctive features that we have equipped are as follows: (1) accumulation of meal records using photos and comments, (2) learning by reflecting on one’s eating histories, (3) learning by comparing one’s history with those of others, (4) knowledge acquisition by quizzes and explanations, and (5) increasing motivation by a point-based game system. The results of our experiment have confirmed that our system works as we expected and that participants could improve their eating habits by learning about food and meals, and by reflecting on their own eating habits through the learning activities in our system.
