With its recent rerelease, it's time to take a look at a suitably spooky Shonen Jump title from the past.
SHAMAN KING (Shaman Kingu), by Hiroyuki Takei. First published in 1998 and first published in North America in 2003.
PLOT:One night after cram school, Manta runs into a strange young boy in a graveyard staring at the stars. This boy, Yoh, turns out to have the ability to see ghosts. That's because he is a shaman, someone who can not only communicate with spirits but to summon them at will and use their unique powers in battle. That skill soon comes in handy when the two have to deal with neighborhood bullies, angry ghosts, and a rival shaman named Ren who wants Yoh's favorite ghost for himself.