Masuo Kinoko is the original creator of the light novel series A Gatherer's Adventure in Isekai, which has expanded into a manga adaptation and an upcoming anime television series. Kinoko began writing the story online in July 2016, and it became an instant hit, leading to a print publication deal with AlphaPolis. The revised edition of the first light novel volume was released in January 2017, marking Kinoko's debut as a published author. The series won the Grand Prize and the Reader's Award at the 9th AlphaPolis Fantasy Novel Award.

The light novel series, which is ongoing, has been published in sixteen volumes as of March 2025. The illustrations for the light novels have been handled by multiple artists, including Senbon Umishima, Katsuki Onda, and Susumu Kuroi. A manga adaptation illustrated by Tomozo began serialization on AlphaPolis's manga website in December 2017 and has been collected into eight tankōbon volumes. The manga is published digitally in English through the Alpha Manga service. An anime television series adaptation produced by Tatsunoko Production and SynergySP is scheduled to premiere in October 2025.

The story follows Takeru Kamishiro, an ordinary office worker who is summoned to a fantasy world called Madeus. He is granted multiple skills, including enhanced physical abilities, magic, and a special power to search for valuable items. Kinoko has stated that the idea for the protagonist, a material gatherer, came as an escape from the reality of uncompensated daily life, expressing a desire to look at things he had never seen before. The series is categorized under the isekai genre, focusing on adventure and fantasy elements. As of March 2025, the series had over 1.95 million copies in circulation, including digital editions. Information about Masuo Kinoko's personal background remains limited, with the author noting in a brief biography that they live in Yokohama and have a fondness for food, particularly crab.