Originally an editor, Kaku began working as manga artist in 2009 with Memory Customs, a one-shot published in Jump Square.
After working as an assistant to Tatsuki Fujimoto, Kaku launched his second series, Hell's Paradise: Jigokuraku, in Shōnen Jump+, which quickly became the most popular manga on the platform.
As a child, Kaku often spent time painting and practicing swordplay with his cousin, Takeshi Tsuruno.
[1] Kaku entered the manga industry in 2007, when he began working as an editor for Weekly Shōnen Champion.
[2] After leaving Akita Shoten in 2008, Kaku wrote a one-shot, titled Memory Customs, which was published in Jump Square in 2009.