Suer Sentai vs One Piece
Connection:
Both are red clad pirate Captains from shows of popular genres of Japanese entertainment (Tokusatsu and Shonen Anime respectively)
Both were saved at a very young age by a pirate (AkaRed and Shanks respectively) that inspired them to become a pirate in their older years
Both are hot-headed and reckless though they both have a good heart and do the right thing at times, but doesn't like being "heroes" causing them to have subjective moral code
Both have a pirate crew (The Gokaigers and the Straw Hat Pirates respectively) with their respective crewmates being very similar to each other, with a stoic yet cool swordsmen that are their second in command (Gokai Blue/Joe Gibken and Roronoa Zoro respectively), loud female treasure lovers who came from that came from poverty (Gokai Yellow/Luka Millfy and Nami respectively), a fourth member who are easily frightened and clumsy, but are brave when they have to be (Gokai Green/Don Dogoier and Usopp respectively) and quiet, gentle princesses (Gokai Pink/Ahim de Famille and Nefertari Vivi respectively)
Both also have a pirate ship (Gokai Galleon and Thousand Sunny respectively)
Both are seeking a fabled treasure (The One Piece and "The Greatest Treasure in the Universe" respectively)
Both of them have a massive bounty on their heads of billions as a result
Both fight an assortment of rivals, ranging from other pirates or a large military organization that put a bounty on their heads (The World Government and the Space Empire Zangyack respectively)
Both are also known to have terrible adaptations when brought into the West (The 4Kids dub of One Piece and Kaizoku Sentai Gokaiger being adapted into Power Rangers Super MegaForce)