Appare-Ranman!

No dream is too big for Appare Sorrano, a socially-awkward inventor living in a small rural town in Japan in the late 19th century. Fascinated since childhood by the creation of steamships that can connect people across great distances, he's learned to make machines of all kinds from various scientific texts. His goal is to sail across the sea, beyond the sky, and ultimately, to the other side of the moon. Unfortunately, through a string of events, Appare finds himself stranded in the middle of the sea on his mini steamship.

Floating alongside him is a skilled but cowardly samurai, Kosame Ishikki, who was tasked to keep his eccentric behavior in check.