Tomiyaki Kagisora, also written as 鍵空とみやき, is a Japanese manga artist. The creator is born on March 3rd, though the specific year is not publicly documented. Kagisora is known for originating several manga series, most notably Happy Sugar Life, which received an anime television adaptation.

Kagisora began publishing short works in 2009 with stories like Yume no Michi and Yuugure in magazines published by Houbunsha. The first original serialized work is Kamiyome, which ran in Square Enix's Monthly Gangan Joker from January 2011 to December 2011 and was collected in two volumes. Following this, Kagisora worked as the artist for manga adaptations of other media, including TARI TARI, based on the original anime by P.A. Works, and Fantasista Doll: Prelude Kagami, based on the Fantasista Doll project.

The major original work is Happy Sugar Life, serialized in Monthly Gangan Joker from May 2015 to June 2019. The series is written and illustrated solely by Kagisora and spans eleven volumes. It is a psychological horror romance story centered on a high school girl who becomes determined to protect a younger girl at any cost, including committing murder. The manga was licensed for English release by Yen Press. An anime television adaptation produced by studio Ezo'la aired from July to September 2018.

Following the conclusion of Happy Sugar Life, Kagisora launched another original series, Romancing Apoptosis Doll: Sartain in Love, also known as恋爱自灭人形 学生会长恋爱中. This science fantasy romance manga ran in Monthly Gangan Joker from November 2021 to February 2024 and was collected in four volumes.

The artistic identity of Kagisora is closely tied to exploring dark psychological themes, often focusing on twisted or obsessive forms of love and their consequences. Happy Sugar Life in particular is recognized for its portrayal of a yandere protagonist, a character archetype defined by initial sweetness that gives way to violent possessiveness. The work is often categorized as a dreadful pure love psychological horror story. Earlier short works, such as White Sugar Garden, Black Salt Cage published in September 2014, served as a prototype for Happy Sugar Life.

The significance of Kagisora within the manga and anime industry comes from the success of Happy Sugar Life, which stands as a notable example of the psychological horror genre in mainstream shonen manga. Its adaptation into an anime brought the creator wider recognition. The ability to sustain a serialization for over four years and have it adapted for television demonstrates a strong command of the medium and a distinct creative voice that resonates with audiences seeking intense, character-driven narratives.