The creator credited for the anime and manga series Ojisan wa Kawaii Mono ga Osuki operates under the name Tsutomu. This individual is the original manga author of the series, which began serialization in 2017 on the Comic Polaris website, a digital platform operated by FlexComix. As of February 2025, eleven compiled volumes of the manga had been released. The story follows a forty-two-year-old man who maintains a cool and reliable persona at work while secretly harboring a deep fondness for cute things. A live-action drama adaptation has been produced, and a television anime adaptation produced by the studio LIDENFILMS was announced for a 2026 premiere, with a teaser visual drawn by Tsutomu himself. No other verified original works or biographical details, such as date of birth, other manga titles, or professional history, are documented for this creator in available sources.