A Gatherer's Adventure in Isekai (素材採取家の異世界旅行記) is a Japanese light novel series written by Masuo Kinoko and illustrated by Senbon Umishima, Katsuki Onda, and Susumu Kuroi. Originally published online since July 2016, AlphaPolis has published seventeen volumes of the series since January 2017. A manga adaptation illustrated by Tomozo, began serialization online via AlphaPolis' manga website in December 2017, and has been collected in nine tankōbon volumes. The manga is published digitally in English through Alpha Manga. An anime television series adaptation produced by Tatsunoko Production and SynergySP aired from October to December 2025.
Premise
Takeru is frustrated with his hectic life, wishing for a change. While watching TV after work, he suddenly wakes up in the domain of the overseer of the universe, or "god". Informed that he died, Takeru accepts being reborn on a magical planet called Madeus. It turns out that Madeus' civilizations keep collapsing due to the failures of the inhabitants, so God wishes to cause a ripple effect to stop this cycle; by introducing an outsider with new ideas and perspectives to the world.