Io Kajiwara, also known by the name Io Kaziwara, is a manga artist and original creator recognized for works in the boys' love genre. The creator is credited under the name 梶原伊緒 in Japanese. Their body of work is primarily published by Suiseisha, often under imprints like Furenza and through digital platforms such as ComicFesta.

Kajiwara is best known as the author and illustrator of the manga series Reincarnated Into Demon King Evelogia's World, originally titled Maou Evelogia ni Mi wo Sasage yo. The series began serialization in April 2020 on digital manga services. Its first compiled volume was released in February 2021, accompanied by a drama CD featuring voice actors Shun Horie and Takuya Satou. The series received an anime adaptation that premiered in October 2021 as part of the ComicFesta Anime project, with the work credited as the original source material. The adaptation was produced in two versions, a censored television broadcast and an explicit version distributed via online streaming.

Beyond this notable work, Kajiwara has created other manga titles, including Torokeru Sukēfeisu, released in September 2020, and Baritachi Tenshi ni Dakareru Oshigoto, released in October 2018. Kajiwara has also contributed to an anthology, contributing to the collection Seifuku x Kinniku BL published in October 2020. These works consistently fall within the boys' love genre, often incorporating fantasy settings and themes of relationships between men.

Kajiwara's artistic identity is established within the niche of boys' love manga, with a recurring pattern of pairing assertive, sometimes dominant characters with protagonists who find themselves in transformative situations. The work Reincarnated Into Demon King Evelogia's World exemplifies this, blending isekai fantasy elements with a romantic storyline between the reincarnated protagonist and the demon king. The creator maintains an active presence on social media platforms like Twitter under the handle @kaziwaraio.