Torinosasami is a manga creator best known as the original creator behind the anime and manga series Teikō Penguin. This series, which began as a short manga posted on Twitter in 2018, follows a penguin navigating the absurdities and unreasonable demands of a so-called "black company," using sarcasm and sharp wit to confront workplace bullying and power harassment.

The creator began publishing satirical manga featuring animal characters on social media approximately ten years prior to the rise in popularity of Teikō Penguin, which gained significant traction online, amassing millions of likes by early 2019. The success of the online manga led to its print publication by Kodansha under its KC Deluxe imprint starting in March 2019. Teikō Penguin was subsequently adapted into an anime for YouTube in January 2019, and later into a television anime that premiered in January 2022, with animation production handled by Plott.

A key aspect of Torinosasami’s artistic identity is the use of animal characters to depict heavy themes related to corporate exploitation and adult anxieties, blending a humorous and satirical tone with pointed social commentary. The creator has stated that the series is informed by personal experiences with the absurdities of corporate working life. Notably, regarding the anime adaptations, Torinosasami has commented that the tone of the YouTube anime differed slightly from the original manga due to a lack of direct involvement in that production.