Emoji comes from a Japanese word, literally meaning "image letter", which is a small digital image or pictorial symbol that represents something, feeling, or concept used in text messages and other electronic communications. This study aims to describe the role and function of emojis used by Japanese idols as Japanese-language Twitter users. This study relied on data sourced from Twitter accounts of Japanese idols who use Twitter to convey messages/news to fans, which amounted to 368 tweets, and which were posted within 1 month. 96 types of emoji were classified into 4 roles and functions: Pictograms (symbols that represent concrete objects), Ideograms (symbols that represent concepts or ideas about something), Emoticons (symbols that represent feelings), and Phatic expressions (expressions to establish or maintain contact between the communicator and the communicant). The analysis shows that the roles and functions ranking of emojis which were found include (1) Phatic expressions, (2) Emoticon, (3) Ideograms, and (3) Pictograms. The top 3 most frequent emojis were ✨(Glitter/Shiny), 🙏🏼 (Praying Hands) and 🔥 (Fire). Through their messages, news, and daily activities, Japanese idols most often use emojis as an expression to establish/maintain contact between idols and their fans.