is a Japanese band consisting of two female members, Yui Niitsu ("Yui") and Yukari Katoh ("Yuka").
== Notable songs =
- Harmonia (ãã«ã¢ãã¢), 2nd ending theme song for Naruto (episodes 26-51)
- HÅkigumo (ãã¦ãé²), 1st opening theme song (episodes 1-29) and 7th ending theme song for Yakitate!! Japan (episode 69)
- Kokoro Biidama (ã³ã³ããã¼ãã), 6th ending theme song for Yakitate!! Japan (episodes 63-68)
- Utatane (ã¦ã¿ã¿ã) (June 23, 2004)
- Mugen Factory (å¤¢ç¾ãã¡ã¯ããªã¼) (May 24, 2006)
*Rythem's official website (in Japanese)