ハイスイノナサ (haisuinonasa) is a Japanese math/post-rock band formed in 2004. The band’s original lineup consisted of guitarist Yoshimasa Terui, bassist Atsumasa Terui, keyboardist Tomoyuki Tamura, and drummer Keisuke Nakamura before being joined by vocalist and keyboardist Ai Kamano in 2005. Tamura left the band in 2012 and was eventually replaced by Kazuki Moriya in 2015. In mid-2016, ハイスイノナサ announced Kamano’s withdrawal from the group