Asuka Kasen (Japanese: 加瀬明日香, Kase Asuka) is a character in the Grand Theft Auto series who appears as the tritagonist in Grand Theft Auto III (set in 2001) and a main character in Grand Theft Auto Advance (set in 2000). She is the shateigashira (co-leader) of the Yakuza in both her appearances; after the death of her brother, she became the main leader of the Yakuza. Asuka is also related to her brothers Kazuki and Kenji and her niece Yuka.