Shiritori is a word game where players have to say a word starting with the last kana from the previous word. A player loses when he/she uses a word that end with the kana, "ん," or repeats a word that has already been said.
In this example:
さやか (Sayaka) かさ (umbrella) さくら きょうこ (Sakura Kyouko) こーす (course) すみ (charcoal) みき さやか (Miki Sayaka)<-Kyouko loses the game