FictionJunction Yuuka (フィクションジャンクション・ユウカ, Fikushon Jankushon Yūka, stylized as FictionJunction YUUKA) is a pop duo from Japan consisting of Yuuka Nanri (vocals) and composer Yuki Kajiura (composition, lyrics and keyboards). It is part of Kajiura's solo project FictionJunction.