One Piece, Seihou Bukyou Outlaw Star Recommendations
Both series give off a similar feeling of an epic endless adventure.
Outlaw Star however, was only 26 episodes long.
Charimastic leads building up their crews, great female characters (somewhat rare in today's shounen titles), similar settings (Government, Criminals and Bounty hunters).
MC chasing his dream to wander around the world freely.
The concept of Pirates and Military.
Captain and his crew of unique and interesting bunch of people.
A valuable Treasure which the pirates and outlaws search for.
One Piece(OP) is about the Sea Voyage while Outlaw Star(OS) is about Space Journey.
In OP, the 2 main forces are Pirates and Navy on the Sea while there are 3 main forces drifting in space in OS .