This research examined features of emotions and display rules based on experiences on the falsifying emotional expressions. Seventy-six Japanese sophomores (22 males and 54 females) participated in this study. Students were asked to report the frequency of experiences in the simulating and masking of six emotions (anger, disgust, fear, happiness, sadness, and, surprise) in daily life. They were also asked to identify the circumstance under which they simulated and masked their emotions. Results suggested that (1) sadness, disgust, anger, and fear tend to be masked but not simulated, (2) happiness tended to be simulated but not masked, (3) surprise was seldom masked nor simulated. A cluster analysis suggested three types of falsifying emotions by simulating and masking circumstance; (1) masking of happiness, sadness, disgust, and anger, (2) simulating sadness, surprise, anger, disgust, and fear, (3) masking of surprise, fear and simulating happiness.