Sachiko was revealed on the Vocaloid website on July 23, 2015. A jobplugin called "Sachikobushi" was available, which aimed to facilitaterealisticreproduction of Kobayashi's voice. It would also include ExVoice for sounds such as shouting. The first demo and a digital download of the voicebank were both released on July 27. Preorders for the physical box and trial versions were also available. The boxed version would be sold in August.