SF-A2 codename miki (SF-A2 開発コード miki), is a Japanese VOCALOID, and was initially released in December 2009 for the VOCALOID2 engine. There is currently ongoing development towards an upgrade to the VOCALOID4 engine. Her voice is provided by the Japanese female singer, Miki Furukawa (フルカワミキ / 古川 美季; Furukawa Miki). On May 14th, 2015, AH-Software confirmed that miki would only have a Natural voicebank and would release on June 18th, 2015. It is possible to buy her Natural voicebank, but there was also information about a starter pack. Other details such as tempo, range, the prices for her packages were also revealed. It was also shown that miki V4 has an official MMD model by KIO.