Horie has been very active as a musician, having performed and/or recorded with Japanese and international artists including Acrobat Bunche, American Rock, Billy No Mates, Chocolat, Cocco, Cubismo Grafico, Curly Giraffe, El-Malo, Freedom Suite, Great3, Hideki Kaji, Kaela Kimura, Kahimi Karie, Love Psychedelico, Master Low, Pizzicato Five, Plagues, Quruli, Snapshot, Studio Apes, and many others.
In 2005, Horie formed Singer Songer with Shigeru Kishida of Quruli, Cocco and others, releasing one single and one album.
In the summer of 2007, Horie was invited by Yukihiro Takahashi of Yellow Magic Orchestra to form the pop electronica band pupa.
He produced all the group’s songs in collaboration with Takeshi Hosomi, the former lead vocalist of Ellegarden, and performed with the band live at concerts and festivals.
He is featured on the song "One Thousand 20th Century Chairs" from Kahimi Karie's album K.K.K.K.K.. American Rock Billy No Mates Chocolat Cocco Cornelius Cubismo Grafico Hideki Kaji Kahimi Karie Neil & Iraiza Pizzicato Five pupa Singer Songer Snapshot The Hiatus