銀河パトロール ジャコ [Jaco the Galactic Patrolman]

A short-lived but significant 2014 series from Shueisha by legendary creator 鳥山明, Jaco the Galactic Patrolman serves as a direct prequel to the Dragon Ball universe. It follows the titular space policeman as he crash-lands on Earth and interacts with a young scientist, subtly weaving in the origins of key Dragon Ball elements. Though only a single issue, its importance lies in bridging the gap between Dragon Ball and its sequel, Dragon Ball Super, while showcasing 鳥山明's signature blend of sci-fi adventure and humor.