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SF-A2 miki

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"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 upgraded 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 design was unique among the VOCALOIDs. She had no references to YAMAHA based musical instruments like other VOCALOIDs and was designed to look cybernetic, giving her a more sci-fi look then 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 is 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 then she looks, similar to how Miku and Rin could do the same.[3]

The illustrator also gave a "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.

Examples of UsageEdit

There are a list of songs featuring the VOCALOID SF-A2_miki (SF-A2_開発コード_miki). Songs listed here may have SF-A2_miki singing as the main singer, or as a backup. VOCALOID SF-A2_miki is featured in 47 Songs and on 44 Albums- on this wiki. For notable songs by statistical views see the Songs featuring SF-A2_miki page. And for song listings, see these pages for Originals and Covers.


External search →

Romaji — SF-A2_miki | Favicon-nico Favicon-youtube Favicon-bilibili
Alias — miki | Favicon-nico Favicon-youtube Favicon-bilibili
Written — SF-A2_開発コード_miki | Favicon-nico Favicon-youtube Favicon-bilibili

To our readers and editors: For section notes, please read this tutorial. And before adding translated videos, please read this tutorial.

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

Additional informationEdit


To promote the release of SF-A2 miki, an album with 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 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 was pulled 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 then 1,000 videos uploaded on Nico Nico Douga in 2011 between July 1st and December 15th. 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 128 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 120 people voted.


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


  1. [1]
  2. link
  3. link
  5. - Xmas CD
  6. VOCALOID Enjoy
  7. VCC - How big is the Japanese Vocaloid community?
  8. link
  9. link

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 where you...
    • Hirarichan wrote:Where was the other one you mentioned? I CRAVE IT- *shot* It sounds REALLY interesting. Can't find the image by itself anymo...
  • 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 part...

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