 The fourth season, titled "Symphogear AXZ" (pronounced "axis"), began airing between July 1, 2017 and September 30, 2017.The opening theme is "Testament" performed by Nana Mizuki, and the ending theme is "Futurism" performed by Ayahi Takagaki, with multiple new character and insert songs performed by Aoi Yūki, Nana Mizuki, Ayahi Takagaki, Yōko Hikasa, Yoshino Nanjō, Ai Kayano, Minako Kotobuki, Shōta Aoi, and Rina Hidaka.The fifth and final season, titled "Symphogear XV", was originally scheduled to premiere in April 2019, but the airdate was pushed back to July 2019 in order to further refine the anime before its release.