Wandering Island

Wandering Island (冒険エレキテ島, Bōken Erekitetō?) is a Japanese seinen manga series written and illustrated by Kenji Tsuruta. It was first published as part of Kodansha's manga anthology Manga Box AMASIA (ja) on July 13, 2010 and continued serialization in Kodansha's manga magazine Afternoon in 2012. Kodansha published the first collected volume on October 21, 2011. The manga has been licensed in North America by Dark Horse Comics, with the first volume being published on July 26, 2016.

Plot
After her grandfather's death, Mikura chose to continue their island express courier service. With her seaplane and her adventurous cat, Endeavor, she lives life as she chooses. Soon, Mikura becomes very interested in a mysterious island that seems to move around, according to local legend. After some extensive effort to determine the island's whereabouts, she manages to get a brief glimpse of it from the sky. Now that she knows it's real, she's determined to find the island again, no matter what it takes.