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Nekomura Iroha VOCALOID2 VOCALOID4 | Songs Albums Notable Originals

This article is about the VOCALOID4 software known as a voicebank. If you are looking for the VOCALOID character then click here.


Silhouettes for Nekomura Iroha, along with the other VOCALOIDs by AHS, were revealed on a poster on November 6, 2014. However, it was unconfirmed what they were for at the time.[1] On November 20, it was confirmed in the VOCALOID4 debut livestream that they all, with the exception of Tohoku Zunko, would be receiving VOCALOID4 voicebanks.

On April 25, 2015, another Iroha design was revealed at the Nico Nico Choukaigi event but it was unknown what the design was for.[2]

On May 14, AH-Software confirmed that Iroha would have a Natural and a Soft voicebank which allowed her to use Cross synthesis, and she would release on June 18, 2015. It was also revealed that the design shown in April was for her Soft voicebank while the design shown at the VOCALOID4 debut livestream was for her Natural voicebank. Iroha's voicebanks would be available for purchase individually or together, and a starter pack version would also be offered. Other details such as tempo, range, and the prices for her packages were also revealed. It was shown that she received official MMD models of her Natural and Soft designs by ISAO.[3]

On June 4, trial versions for Iroha's VOCALOID4 voicebanks were made available.[4]


Iroha's VOCALOID4 package is supported by exVoice samples.

Product Information[]



機械仕掛けの歌姫 (Kikai Shikake no Utahime) (Natural/Soft) NicoNico SoundCloud
フルパワー!まじかるぼいすっ! (Full Power! Magical Voice!) (Natural) NicoNico SoundCloud
お前という名の物語は泪で汚れちまってる (Omae to iu Na no Monogatari wa Namida de Yogore Chimatteru) NicoNico

System Requirements[]

  • OS:
    • Windows: Windows 8.1, Windows 8, Windows 7(32/64bit)
    • Mac: Mac OS X 10.9, 10.8 (32/64bit)
  • CPU: Intel Dual Core CPU
  • RAM: 2GB or more
  • Hard Disk Capacity:
    • Natural:
      • More than 1.5GB (using VOCALOID4 Editor)
      • More than 9.4GB (using VOCALOID4 Editor for Cubase + Cubase)
    • Soft:
      • More than 1.5GB (using VOCALOID4 Editor)
      • More than 9.4GB (using VOCALOID4 Editor for Cubase + Cubase)
    • Complete:
      • More than 2.5GB (using VOCALOID4 Editor)
      • More than 10.3GB (using VOCALOID4 Editor for Cubase + Cubase)
    • Starter Pack: More than 2.5GB (using VOCALOID4 Editor)
  • Internet connection.



Product Information
  Trial/Demo Vers?: Yes  Starter Available?: Yes
Package details as noted:

This is the new version of Iroha. It's a professional voicebank intended to be a direct recreation of her voice provider's vocals. This replaces the old version of the package with a updated version plus an additional voice for XSY.

Vocal traits as noted:
  • GWL capable
  • General phonetic quality improved

Cross-Synthesis as noted:

XSY possible between "Soft" and "Natural"

  • In total the package offers the equivalent of 2 additional voicebanks achievable via XSY. The total tone variation offered by the package comes to a theoretical 4 voicebanks in total.

  • From Ver.4.3.0 of the VOCALOID engine onwards, a XSY group "AHS" was added to VOCALOID. All vocals within the "AHS" group can XSY with each other. This vocal release is part of this group. If a user owns one or more vocal releases within the "AHS" group, XSY between them will open up.[5][6]
    • The group has 8 characters within it that can XSY: Yuzuki Yukari, Macne Nana, Macne Petit, Tohoku Zunko, Hiyama Kiyoteru, Nekomura Iroha, SF-A2 miki and Kizuna Akari.
    • The "AHS" group is currently the second largest XSY group within VOCALOID, having a total of 14 voicebanks that can XSY with each other. If old versions that have since been re-released are removed, there are currently 12 unique voicebanks. These are: "Yuzuki Yukari Jun", "Yuzuki Yukari Onn", "Yuzuki Yukari Lin", "SF-A2 miki", "Tohoku Zunko", "Macne Nana", "Macne Petit", "Kizuna Akari", "Hiyama Kiyoteru Natural", "Hiyama Kiyoteru Rock", "Nekomura Iroha Natural" and "Nekomura Iroha Soft".
    • In total if a user was to own every VOCALOID3 and VOCALOID4 AH-Software vocal within the "AHS" group, this offers the equivalent of 182 additional voicebanks achievable via XSY. The total tone variation offered by the combined packages comes to a theoretical 196 voicebanks in total.
  • Note that also "GWL" does not become viable for use with any V3 vocals used as the primarily vocal. This should be considered when using any vocal for XSY within the "AHS" group from V3.
  • Also note that the updated vocals that brought a VOCALOID from VOCALOID3 into VOCALOID4 provided few differences, aside from adding GWL. Therefore these updates can provide little difference when used for XSY.

  • Individual Vocals[]

    Product Information
      Optimum Range: E2 ~ G4  Optimum Tempo: 70 ~ 170 BPM
      Total Tempo (min-max): 100 BPM  No. of Keys: W ~ 17, B ~ 11, Total ~ 28
    Package details as noted:

    Iroha's "NATURAL" voicebank is a direct update of the original VOCALOID2 vocal and is intended to have a natural sounding tone.

    Vocal traits as noted:
    • Maintains the original VOCALOID2 qualities: "powerful" tones and a clean, clear voice.
    • Triphones added.
    • Can use GWL.
    • Compared to "Soft", it can handle faster genres of music much easier.
    • It has a larger tempo range than "Soft" and can handle more genres of music.
    • Maintains the same vocal traits as the original V2 package.
    Software issues as noted:
    • A complaint related to this voice is that it does not always sound like the original VOCALOID2 version.
    Voicebank sample

    Nekomura Iroha VOCALOID4 Natural

    Product Information
      Optimum Range: F2 ~ F♭4  Optimum Tempo: 50 ~ 130 BPM
      Total Tempo (min-max): 80 BPM  No. of Keys: W ~ 14, B ~ 10, Total ~ 24
    Package details as noted:

    Iroha's "SOFT" voicebank is a softer version of the Iroha voice.

    Vocal traits as noted:
    • Tackles the main issue with the original Iroha voice of being too solid for some genres of music.
    • Is intended to be more expressive than the original vocal and has a much breathier, loose but realistic texture.
    • Handles slower songs better than the "Natural" voicebank.
    • Like "Natural", this voice is clear and clean sounding.
    • Much more feminine sounding compared to the original voice.
    Software issues as noted:
    • It has a smaller tempo range than "Natural".
    • The voicebank is more breathy and raspy than soft but it allows her to work well in softer music compared to Iroha V2 + BRE.
    Voicebank sample

    Nekomura Iroha VOCALOID4 Soft