Kaolinggggggggggggggg
DECO*27
wowaka
KodaP
EmpathP
HatsuneMikuVocaloid2 (Cien)
cosMo
kz@livetune (aka kz/livetune)
EZFG
AVtechNO!
Treow (and company, ELECTROCUTICA)
Kuwagata
40mP
baker
acane_madder
Toku-P
Junky
DATEKEN (And he speaks english pretty well too, hahaha)
Kuwagata, baker, acane_madder, Toku-P, Junky, and DATEKEN all were part of a Nico Nico Douga "Album" called "&" that had VOCALOID producers working with Utaittes to make songs with the themes of "Connecting with People" and "Building on society", and the second one of Kuwagata's works in the album ("Tail Light", with F9 on vocals) was "One Person vs. Society".
Therefore I love those 6 producers simply for the cooperation in the project. XD