UTAU wiki

Iku Acme (阿久女イク(あくめいく)) was a program made using Adobe Flash Player as a base. She was created for the intent of making eroge noises and has to be bought online. All of her noises consist of moans, screams, or yelps, and over 150 sounds have been included with her. Due to the discontinuation of flash in 2020, the flash version was unusable. However, on November 15, 2020 StudioS provided a .exe version for download.

Some users have imported her "voice" into the UTAU program, with rough yet playable results. Since the results aren't exactly perfect, her voice sounds quite wavy and robotic. As a result, one would have to create an oto.ini file from scratch. But with proper filters and modification, she can produce a very clear voice.

On January 23rd, 2022, an official UTAU voicebank was released featuring new vocals by Sayaka Kazuna. The voicebank was produced in collaboration between Kanna and StudioS. She is now considered both an UTAUloid and a ''MAIDLOID''


Iku Acme's voice was made to be used in games and animations, which were allowed be sold. However, it is illegal to distribute her full voicebank. There are exceptions with the Lite version.

On December 27, 2017, for Iku Acme's tenth anniversary, StudioS announced that there would be a new character added to the Character H-Voice Series named RIYONA,[1] and Iku Acme's page on DLsite was updated as well, adding contents from the physical CD extras to the MAIDLOID editor. Anyone with a valid purchase of her on DLsite can download the updated version for free.

On May 23 , 2021, a creator named Kanna worked with StudioS to create a new design specifically for UTAU, along with an official Multipitch VCV voicebank. This voicebank was released January 23rd, 2022.



—Favorite phrase[2]

Iku Acme, being a MAIDLOID, is intended for sexual usage. As a character, she is a housemaid android who is meant to be a "lewd yet cute character."


Official concept for her VCV voicebank

Taking a different path from MAIDLOID for UTAU, her concept is based on that of a stereotypical Japanese idol. The onion upon her head is now replaced by a scrunchy, her dress now has more volume in addition to a huge bow in the back; her hair now longer with more depth, and her uwabaki have been replaced with high heel platform shoes. Her character in UTAU is now more focused on the ''cute'' side.


  • 阿久女 (Acme) The Kanji is the choice of corresponding pronunciation and has no valid literal interpretation. "アクメ" (Acme) in Japanese literally means "orgasm."
  • イク (Iku) - A common erotic moan in Japan, meaning "to come (or cum, as referred sexually), to orgasm."
  • As such, her name translates into "an orgasm to come" (Japanese order) or "to come to an orgasm" (Western order).


Related characters

  • Princess Knight RIYONA - Same creator

Voicebank distribution

Voicebank Reclist Range Description DL
Official UTAU Voicebank VCV ? "Iku's official voicebank" DL

Voice samples



  1. StudioS Blog Post Iku Acme 10th Anniversary + Riyona Announcement
  2. "Iku! - An erotic moan"

External links