Toriko

Hamburgers that grow out of the ground like four-leaf clovers, mountain ranges carved out of ice cream, and warm servings of mac and cheese that stew deep within the stomachs of volcanoes fill the landscape. This world of delectable natural wonders has reached a prime age of exploration—the Gourmet Age! Citizens and chefs alike aspire to taste and prepare the finest dishes, while adventurers called "Gourmet Hunters" seek out delicious rare ingredients.

Possessing a unique set of skills, the wild and passionate Gourmet Hunter Toriko is infamous for discovering 2% of all known ingredients. Together with his friend Komatsu—a highly skilled chef working at a five-star hotel—Toriko strives to complete his Full Course Menu of Life. But it isn’t going to be easy; in order to obtain the most delicious ingredients, Toriko must battle against obstacles like deadly monsters, evil organizations, and food itself!

The first episode is actually a two-part special called "Toriko x One Piece Collabo Special"—a crossover with One Piece. The first part aired during Toriko's timeslot at 9:00, and the second part aired during One Piece's timeslot at 9:30. That is also the reason why the second Toriko episode doesn't continue where the first one left off.

Episode 51 is the first part of a two-part special called "Toriko x One Piece Collabo Special 2"—another crossover with One Piece. The second part is One Piece episode 542. The first part aired during Toriko's timeslot at 9:00, and the second part aired during One Piece's timeslot at 9:30.

Episode 99 is the first part of a two-part special called "Dream 9 Toriko & One Piece & Dragon Ball Z Super Collaboration Special"—a crossover with One Piece and Dragon Ball Z. The second part is One Piece episode 590. The first part aired during Toriko's timeslot at 9:00, and the second part aired during One Piece's timeslot at 9:30.

(Source: AniDB)