One Piece: Started by Catching Dragon Maid Tohru

Roland, who transmigrated because he didn't wear a helmet while fishing, awakened the Fishing to Become Stronger System. He started with one fishing rod, and all his equipment depended on what he fished up.

Fishing in Windmill Village, he caught SSS-rank Dragon Maid Tohru—I really didn't want to be a Dragon Knight! It's so good!

Fishing in Shimotsuki Village, he caught the famous swords White Oar & Black Oar (Swords).

Fishing in Loguetown, he caught SS-rank Pirate King Roger's max-level Haki of the Supreme King.

...

Fishing on Egghead, he caught Android 18.

At the Summit War, Whitebeard and the Marines faced off.

Roland: Give me some face, don't disturb my fishing.

Ding-dong~ Congratulations on catching a Time-Space Furoshiki.

Ding-dong~ Congratulations on catching a limited-time awakening card for Sun God Nika.