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For other uses, see On-off (disambiguation).
Also known as On/Off
Origin Japan
Genres Jpop
Years active 2007-2015
Labels Music Ray'n Inc., DefStar Records
Website www.onoff-net.com
  • Naoya Sakamoto
  • Kazuya Sakamoto

On/Off (stylized as ON/OFF) is a Japanese Jpop duo which consists of twin brothers, Naoya Sakamoto (坂本 直弥 Sakamoto Naoya?) and Kazuya Sakamoto (坂本 和弥 Sakamoto Kazuya?). The duo debuted in 2007 releasing the single "Eien no Setsuna" (永遠の刹那?, "Eternal Moment").


On/Off debuted on November 21, 2007 with "Eien no Setsuna" (永遠の刹那 "Eternal Bond"?), which was used as the ending theme song the live-action adaptation of Fūma no Kojirō; they were also a part of its cast. The single debuted at number 59 on the Oricon charts.[1] Following the release of "Eien no Setsuna" was their second single "Futatsu no Kodō to Akai Tsumi" (ふたつの鼓動と赤い罪 "Two Beats and a Red Sin"?) on June 4, 2008. The single achieved more success than their debut single charting at number 19 on the charts.[2] "Futatsu no Kodō to Akai Tsumi" was used as the opening theme song for the first season of anime series Vampire Knight. The duo released two singles, "Rinne: Rondo" (輪廻-ロンド- "Cycle: Rondo"?) (October 2008) that became the opening of the second season anime of Vampire Knight and "Hana Kagari" (花篝-ハナカガリ- "Hanakagari: Bamboo Flower"?) (March 2009), before releasing their debut album Legend of Twins I: Futago Densetsu (Legend of Twins I-双子伝説- Legend of Twins I: The Legend Twins?) on April 22, 2009. The former charted at number 18 on the charts and was used as the opening for the second season of Vampire Knight; while the latter failed to chart on the Top 30.[3][4] Their single "Butterfly" was also used in the anime Durarara!! as the ending theme song.[5] Their new singles "Hajimaru no wa, Sayonara" was used as second opening for anime series Beelzebub and was composed and produced by popular J-pop artist Daisuke Asakura. On 2/11/11 they release their new single 'Akatsuki' and on 7/12/11 is the release of their new album 'Legend of Twins II : Zoku Futago Densetsu'



Year Album details Chart positions
2009 Legend of Twins I: Futago Densetsu
  • Released: April 22, 2009
  • Label: Music Ray'n Inc.
  • Formats: CD, CD+DVD, Box set
2011 Legend of Twins II: Legendary Twins Continues'
  • Released: December 7, 2011
  • Label: Music Rayn' Inc.


Year Title Chart peak Album
2007 "Eien no Setsuna" release date - 21st Nov 2007 59 Legend of Twins I: Futago Densetsu
2008 "Futatsu no Kodō to Akai Tsumi" release date - 4 June 2008 19
"Rinne: Rondo" release date - 15th Oct 2008 18
2009 "Hana Kagari" release date - 4 March 2009 47
2010 "Butterfly" release date - 9 June 2010 15
2011 "Hajimaru no wa, Sayonara" release date - 27 April 2011 31


  1. ^ "Eien no Setsuna's Oricon page" (in Japanese). Oricon. Retrieved 2009-04-27. 
  2. ^ "Futatsu no Kodō to Akai Tsumi's Oricon page" (in Japanese). Oricon. Retrieved 2009-04-27. 
  3. ^ "Rinne: Rondo's Oricon page" (in Japanese). Oricon. Retrieved 2009-04-27. 
  4. ^ "Third week of March's Oricon chart". Oricon. Retrieved 2009-04-27. 
  5. ^ "Official Durarara!! site - Staff&Cast" (in Japanese). durarara.com. Retrieved March 15, 2010. 
  6. ^ a b "On/Off Oricon discography" (in Japanese). Oricon. Retrieved 2009-04-27. 

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