Open Reel Ensemble (Japanese: オープンリールアンサンブル, Hepburn: Ōpun Rīru Ansanburu) is a Japanese band known for their use of open-reel recordings to create music. Formed in 2009, it consists of members Ei Wada, Haruka Yoshida and Masaru Yoshida. The band originally also included members Kimitoshi Sato and Takumi Mamba, who departed in 2015.

After experimenting with open reels in his teenage years, Wada and his friends established the band following a university assignment for a performance presentation. The band garnered acclaim with performances at the NTT InterCommunication Center and Ars Electronica, earning them recognition and an award from the Japan Media Arts Festival. Their works have been used for Issei Miyake's fashion shows. They have released three albums, Open Reel Ensemble (2012), Tape and Cloth (2013), and Vocal Code (2015).