Bleach, Yuu☆Yuu☆Hakusho Recommendations
Two young teens can see ghosts and work for a spiritual organization.
Both are about a teenager with the ability to see spirits and have a mission to protect humans from the evil ghosts.
Shinigamis, Delinquents, traveling into another world, lots of fighting.
Bleach have many reference to Yu Yu Hakusho, mainly in Lost Agent arc (for example at the beginning of this arc Yuzu have Keiko's first hairstyle :O)
A boy has a supernatural experience and grow special powers. He come in contact with a organization that control the transit of soul between one world and another and protect the earth from the evil souls that attack it. The boy ends helping this organization to protect his friends.
A hotheaded teenage boy finds himself involved with a supernatural world of spirits. He and his friends, who also have supernatural abilities, eventually come together to fight the evil forces that pose a threat to both worlds.