January
Prima: 14 January 2008
Unity-chan!: 14 January 2016
LEON: 15 January 2004
LOLA: 15 January 2004
IA: 27 January 2012
Fukase: 28 January 2016
Luka Megurine: 30 January 2009
Nana Macne: 31 January 2014
February
CYBER DIVA: 4 February 2015
Xin Hua: 10 February 2015
kokone: 14 February 2014
UNI: 14 February 2017
Nemu Yumemi: 16 February 2017
KAITO: 17 February 2006 (Crypton print of release date, alternatively 14 February 2006 as per Yamaha print)
Mirai Komachi: 22 February (Bandai Namco Studio Profile)
March
anon & kanon: 3 March 2014
April
Kasane, Teto 1 April 2008
Lapis Aoki: 6 April 2012
Ling Yuezheng: 12 April (Official biographical information)
Stardust: 13 April 2016
VY2: 25 April 2011
May
MAYU: 6 May (As written on the official page)
v flower: 9 May 2014
Iroha Nekomura: 14 May 2009 (Start of the Hello Kitty to Issho! Project)
June
Azuki Masaoka: 11 June (Character profile on the Project 575 official homepage)
ZOLA PROJECT: 21 June 2013
Longya Yuezheng: 24 June 2017
GUMI: 26 June 2009
Sweet ANN: 29 June 2007
July
MIRIAM: 1 July 2004
YANHE: 11 July 2013
Tianyi Luo: 12 July 2012
SONiKA: 14 July 2009
Tonio: 14 July 2010
Sachiko: 27 July 2015
Una Otomachi: 30 July 2016
Gackpo Camui: 31 July 2008
August
ARSLOID: 5 August (ARSMAGNA official site)
galaco (Prize): 5 August 2012
Lily: 25 August 2010
LUMi: 30 August 2017
SeeU: 30 August 2011 (Official, Name + Appearance Reveal)
Miku Hatsune: 31 August 2007
September
VY1: 1 September 2010
Rana: 9 September 2014
YOHIOloid: 10 September 2013
Matcha Kobayashi: 13 September (Character profile on the Project 575 official homepage)
October
RUBY: 7 October 2015
Ryuto: 8 October 2010
Chika: 16 October 2014
Mew: 21 October 2011
Zunko Tohoku: 27 October (Character birthday as written on the official blog.)
CYBER SONGMAN: 31 October 2016
November
MEIKO: 5 November 2004
DAINA: 20 November 2015
DEX: 20 November 2015
December
Kiyoteru Hiyama: 4 December 2009
SF-A2 miki: 4 December 2009
Yuki Kaai: 4 December 2009
Piko Utatane: 8 December 2010
Rion Tone: 16 December 2011
MAIKA: 18 December 2013
OLIVER: 21 December 2011
Akari Kizuna: 22 December (Vocalomakets blog post)
AVANNA: 22 December 2012
BIG AL: 22 December 2009
CUL: 22 December 2011
Yukari Yuzuki: 22 December 2011
Bruno: 23 December 2011
Clara: 23 December 2011
Merli: 24 December 2013
Rin/Len Kagamine: 27 December 2007
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