| ∞2 | |
| Cover: | Infinity Two cover.jpg |
| Type: | single |
| Artist: | Do As Infinity |
| Album: | Eight |
| Released: | June 16, 2010 |
| Genre: | J-pop |
| Length: | 16:56 |
| Label: | Avex Trax |
| Producer: | Seiji Kameda |
| Prev Title: | Kimi ga Inai Mirai |
| Prev Year: | 2010 |
| Next Title: | Jidaishin |
| Next Year: | 2010 |
"∞2" (read "Infinity Ni"; translated as "Infinity 2") is Do As Infinity's 23rd single, released on June 16, 2010. The single is the second in the "Infinity" series, after Do As Infinity's 21st single "∞1" (2009). Like "∞1", "∞2" contains four songs with none named after the single itself. Between September 1 and October 31, 2009, the second installment of a contest called Do! Creative!! was held to give Do As Infinity fans a chance to compose songs that the band would later perform. Of the songs received, two were selected to be placed on "∞2": "Everything Will Be All Right" composed by Shohei Ohi, and "Haruka" composed by Fumiyasu Sueoka.[1] A music video was produced for "1/100" directed by A.T.[2] "1/100" and "Everything Will Be All Right" were used as promotional theme songs for professional Kyōtei boat racing in 2010. "Pile Driver" was used as a promotional theme song for Hiroshima University of Economics in 2010.