Vrioon is the debut collaboration album between Ryuichi Sakamoto and Alva Noto, released in 2002.

This is the first album in the Virus Series followed by four other records: Insen (2005), Revep (2006), utp_ (2008), and Summvs (2011). The initial letters of the five albums together form the word "Virus".

A minimalist album, it is characterized by an unusual experimental sound driven by piano and distorted, clipped samples (a sound which Sakamoto and Noto would also experiment with in Insen in 2005). It was named album of the year by The Wire magazine.

2 x LP, Reissue, Remastered, Gatefold

Tracklist:
A1 Uoon I 13:50
A2 Uoon II 9:40
B1 Duoon 5:47
B2 Noon 10:12
C1 Trioon I 5:08
C2 Trioon II 9:57
D1 Landscape Skizze 8:12