Gin Tama volume 1 features story and art by Hideaki Sorachi.
 
Back in the old days, samurai walked the streets as if they owned them. But then an alien race landed in Japan and stripped the samurai of their status and their swords. In the world of Gin Tama, history takes a wrong turn: samurai in this alternate Japan must live alongside aliens - not to mention guns, TVs, cars, and spaceships.
 
Sakata "Gin" Gintoki is a goofy former samurai who'll take on any odd job to make ends meet. His greatest wish is to protect Japan from yakuza and dishonorable aliens, and return Japan to its former glory - all with a wooden sword!