toi8, a native of Kumamoto Prefecture, was born on October 8, 1976. He graduated from Yoyogi Animation College. After spending two years in the anime industry, he left to become a freelance illustrator after being assigned to work on keyframes. He started working at bishojo magazine Colorful PureGirl for his first job as an illustrator. His name toi8 originates from his birthday.
Several art books focusing on toi8's art have been published. Yonghow Vong of Halcyon Realms praised his art book The Recollection City as "a splendid collection of beautiful illustrations from Toi8, at a bargain price". In July 2025, Ichijinsha released Girls Artwork, an art book featuring both toi8's illustrations from his existing works and exclusive original content.
↑toi8 (2009). 幻想少女 toi8 ART WORKS (in Japanese). Media Factory. ISBN978-4-8401-2735-6.{{cite book}}: CS1 maint: numeric names: authors list (link)
↑Entertainment, Lawson HMV (February 11, 2017). "NO.6 toi8 Design & Art Works". LAWSON-TICKET & HMV (in Japanese). Retrieved October 22, 2017.
↑toi8 (2015). 追憶都市 toi8 ArtWorks (in Japanese). Ichijinsha. ISBN978-4-7580-6511-5.{{cite book}}: CS1 maint: numeric names: authors list (link)
↑"The Recollection City". Halcyon Realms - Art Book Reviews - Anime, Manga, Film, Photography. July 30, 2015. Archived from the original on February 9, 2019. Retrieved October 22, 2017.