This study examines imagined interactions (IIs) among young adults in the United States, Thailand, and Japan. A comparison of means across cultures on II characteristics reveals that the Japanese participants have the widest variety of II partners, whereas the American participants are the most self-dominant in their IIs and demonstrate the most II frequency. As for II functions, Japanese and Thai participants keep conflict alive via their IIs more than the Americans, whereas the Thais utilize the II rehearsal and self-understanding functions the least. The Japanese participants use the II boldness function, which focuses on escaping from societal norms via one’s IIs, more than the Thais and Americans.