Aokana: Four Rhythm Across the Blue, known in Japan as Ao no Kanata no Four Rhythm (蒼の彼方のフォーリズム, Ao no Kanata no Fō Rizumu, subtitled Beyond the sky, into the firmament), officially abbreviated as Aokana (あおかな) and translated as Four Rhythm Across the Blue, is a Japanese adult visual novel developed by Sprite and released for Windows on November 28, 2014. The game was ported to the PlayStation Vita, PlayStation 4, and Nintendo Switch. A manga adaptation began publication in Comp Ace magazine in October 2015. A spin-off mobile game was released in October 2016, while a sequel and a visual novel spin-off were announced for production but have since been put on hold. An anime television series adaptation, produced by Gonzo, directed by Fumitoshi Oizaki, and written by Reiko Yoshida aired between January and March 2016. Crunchyroll and Funimation co-released the anime television series on Blu-ray in North America in 2018.