Day 15 began with the beginner classes learning how to speak in the past tense and the advanced class continuing typing and dictation practice. Later in the day, students had gym time where half of the students dressed up in blow-up sumo suits and played an impromptu game of basketball. The other half of the students participated in a tea ceremony led by the director. The other half will be able to enjoy their own tea ceremony later in the week. Students drank traditional green tea, called matcha, as well as a salted sakura tea, also called cherry blossoms. While the tea ceremony was happening, the other group continued work on their oshibai play.