Sol-fa (ソルファ, Sorufa) is the second studio album by Japanese rock band Asian Kung-Fu Generation, released on October 20, 2004.

[1] Its success can be partially traced to two tracks that the band produced, "Rewrite" and "Haruka Kanata," were featured in the opening themes of the highly popular anime series Fullmetal Alchemist and Naruto respectively.

With the LP, AKG also finally succeeded in outreaching to international audiences, a goal they had attempted in earlier English indie releases but were met by little response [verification needed].

The support for Ajikan eventually resulted in Tofu Records striking a contract to release Sol-fa in the United States on October 18, 2005.

[4] With the LP, AKG fully realized and honed the upbeat tempo but hard-edged and emotionally charged sound first expressed within Hōkai Amplifier.