"Miki" redirects here. For SF-A2's voice provider, see Miki Furukawa.


SF-A2 codename miki (SF-A2 開発コード miki) is a Japanese VOCALOID developed and distributed by AH-Software Co. Ltd., and was initially released in December 2009 for the VOCALOID2 engine. She was updated to the VOCALOID4 engine in June 2015.[1] Her voice is provided by the Japanese female singer-songwriter, Miki Furukawa (フルカワミキ / 古川 美季; Furukawa Miki).



Often shortened to just "SF-A2 miki", her codename of "miki" comes from her provider's name "Miki Furukawa". In Japanese, 'codename' or 'development code' translates as 'kaihatsu koudo'. The meaning of the "SF-A2" part of her name has never been stated.


Her VOCALOID2 design was unique among the VOCALOIDs. She had no references to YAMAHA based musical instruments and was designed to look cybernetic, giving her a more sci-fi look than most other VOCALOIDs at the time.[2] She generally has a star-theme motif and has a star symbol somewhere in every design for her.

According to information that came from the 2012 redesign, miki was designed to look like she was made out of an inorganic material and was conceptualized as an android. Her body was designed to look like that of a child, but also give her the overall appearance of a young teenage female. Though she is an android, she is covered in muscles made from various materials such as carbon nanotubes, but were made loose to give a mild deformed look about them. Having an immature-looking body allowed her to appear younger than she looks, similar to how Hatsune Miku and Kagamine Rin could do the same.[3]

The illustrator also gave an "SFA2 bike" version in 2010 showing miki with her hood up and on a sci-fi themed bike.

Her look was given an overhaul in her VOCALOID4 update and her cybernetic flesh appearance was abandoned. The general science fiction appearance, however, was kept.

Music featuring SF-A2 mikiEdit

  • SF-A2 miki is featured in 57 songs and 53 albums on this wiki.
  • There are listings for notable, original, and cover songs.

Examples of usage

Romaji/English Mujin Eki
Featuring SF-A2 miki
Producers n-buna (music), 大里正毅 (mixing), Awashima (video)
Category Original song
Romaji/English Shatter
Featuring SF-A2 miki,
Producers Circus-P
Category Original song
Hacking to the Gate
Featuring SF-A2 miki
Producers Kannazuki-P (cover)
Category Cover song
Romaji/English Haiiro no Rakuen (The Grey Paradise)
Featuring SF-A2 miki
Producers Iceimo-P
Category Original song
Search for music featuring SF-A2 miki [show/hide]

Additional informationEdit


To promote the release of SF-A2 miki, an album featuring her singing Christmas songs, VOCALOIDS★X’MAS, released in November 2009. Notable VOCALOID song creators' works are included.[4][5]

She, along with Kaai Yuki and Hiyama Kiyoteru, were introduced to expand the VOCALOID market and to give producers more choices.[6]

Until May 2011, all AH-Software VOCALOIDs were banned from KARENT.

See also: SF-A2 miki/Marketing and VOCALOID in other media


  • Kio's model is available for purchase from Windows 100% magazine and the MMD Starter Pack magazine. Previously, the model was available to download from his site, however, it ceased distribution after users violated the model's terms of use.
  • SF-A2 miki's voice provider, Miki Furukawa, used to work for Ki/oon records, which is owned by Sony: the same group Utatane Piko's provider, Piko, comes from.


SF-A2 miki's character status

SF-A2 miki was the most popular of the first three AH-Software VOCALOIDs. However, all three were slow to gain popularity and were among the least popular of the Japanese VOCALOIDs for a while.[7] When interviewed, Tomohide Ogata mentioned he had a feeling SF-A2 miki was very popular overseas.[8]


An independent search on Nico Nico Douga revealed that most VOCALOIDs had less than 1,000 videos uploaded in 2011 between July 1 and December 15. SF-A2 miki fell into this category.[9]

  • One of the first 3 AH-Software VOCALOID2 voicebanks to be released
  • One of the two first female AH-Software VOCALOIDs
  • First VOCALOID of the Artist Edition series to be released


Do you like SF-A2 miki?

The poll was created at 00:14 on November 20, 2015, and so far 611 people voted.
What characteristic of SF-A2 miki do you like?

The poll was created at 00:14 on November 20, 2015, and so far 565 people voted.


SF-A2 miki 300x172
The image gallery for SF-A2 miki may be viewed here.


  5. - Xmas CD
  6. VOCALOID Enjoy
  7. VCC - How big is the Japanese Vocaloid community?

External linksEdit

Japanese AH-Software official homepage Link
Japanese VOCALOID2 SF-A2 miki product page Link
Japanese AHSoftware The official YouTube channel Link
English deviantArt , art and media community Link
Japanese Pixiv , art and media community Link


Start a Discussion Discussions about SF-A2 miki

  • How do you feel about SF-A2 miki V4?

    22 messages
    • Angel Emfrbl wrote:Popularity doesn't equal always reflect the success of a vocaloid. Prime examples are SeeU (seesawing popularity wh...
    • Hirarichan wrote:Where was the other one you mentioned? I CRAVE IT- *shot* It sounds REALLY interesting. Can't find the image by its...
  • Artist Vocal Series

    21 messages
    • Artist Vocal Series - I read in the german Vocaloid Wiki, that "Lily is the first Internet Co VOCALOID; who is not part of their m...
    • Youngerkiyoteru wrote:Artist Vocal Series - I read in the german Vocaloid Wiki, that "Lily is the first Internet Co VOCALOID; who is not p...

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