John (じょん), while not a very prolific producer in the Vocaloid community compared to the other producers in the Tsukiuta. Series roster, has established strong ties with Tsukino Talent Production, and writes songs not only for the Tsukiuta. Series, but also for the other units under TsukinoPro, such as SolidS, Growth, and SOARA. Additionally, he has debuted as an idol under TsukinoPro with first album is "Hajimari no Hi". He is in-charge of producing the September representatives, Nagatsuki Yoru and Asagiri Akane.