The Pipe Machine

From Manga Mavericks Books:

Saburo is a normal kid—or at least he tries to be, but the bizarre finds its way to him with alarming precision. First, a weirdo with a samurai haircut clad in just undies is hanging around his town, then his father builds an honest-to-god time machine that looks like a giant metal smoking pipe. A quick test of the pipe time machine flings the poor boy into the outer realms of space where robots, space captains and a girl who looks very similar to a friend at home await him. Keep all limbs in the pipe and prepare for a funny, fast-paced, and very bizarre adventure in the Pipe Machine!