Gintama Vol. 4

Written and illustrated by Hideaki Sorachi, Gintama takes place in an alternate timeline of the Edo era in which the Earth has been invaded by aliens known as the Amanto. Eccentric samurai Gintoki is just trying to get by in this new world where swords have been banned by operating an odd jobs business. Hilarity ensues.
In volume 4 of Gintama, everyone is just trying to take a break for a bit but their much-needed rest time is interrupted by unexpected space travel, hijacks, giant monsters, and finally rampaging robots…
Notice: This manga is written in Japanese.