Togashi, Yoshihiro

Fourteen-year-old thug Yuusuke Urameshi spends his days skipping school and causing trouble for the adults in his life. Yuusuke regularly engages in street brawls against rival Kazuma Kuwabara and ridicules his childhood friend Keiko Yukimura. Filled with self-loathing and the burden of an alcoholic mother, Yuusuke sacrifices it all in a split-second decision—he tackles a small child out of the way of an oncoming car, losing his life in the process.

Spirit guide Botan intervenes, allowing Yuusuke to see how the people in his life react to his death; he is moved by the emotional ruin his loss causes his mother, Keiko, and even Kuwabara. Additionally, due to his death's heroic nature, he receives an opportunity to return to life from the Spirit World ruler's son, Koenma.

Koenma hires Yuusuke as a "Spirit Detective" and tasks him with solving a series of increasingly challenging paranormal mysteries. Battling and befriending demons such as the beautiful Kurama and hostile Hiei, Yuusuke further develops and utilizes his skills as a fighter. But as dark forces move in the Underworld, Yuusuke struggles alongside his companions to defend everything he took for granted.

[Written by MAL Rewrite]

Yuu☆Yuu☆Hakusho

Yu Yu Hakusho

幽☆遊☆白書

Fujita, Kazuhiro

Ushio to Tora centers around the travails and battles of Ushio Aotsuki, who is constantly being stalked and aided by a gigantic, supernatural and sometimes invisible tiger-like monster.

Ushio's family maintains a Shinto temple in Japan, where ~500 years ago, his samurai ancestor battled that same tiger to a standstill, and eventually trapped him against a rock using a blessed spear called the "Beast Spear," which in addition to its intrinsic formidability as a weapon, can also endow its wielder with the martial ability of the ancestor who originally wielded it.

Ushio accidentally unsealed the cave Tora was trapped in. Initially, Ushio refuses to remove the spear pinning Tora down, but Tora's unsealed presence summons various monsters who wish to fight him, and by extension Ushio. Ushio is forced to free Tora, who would like to eat Ushio, but dares not since Ushio keeps the spear close by. The series focuses on their relationship, interspersed with battles against mythological foes, and with Tora's attempts to grapple with modern life.

(Source: Wikipedia)

Ushio to Tora

Ushio and Tora

うしおととら

Shiina, Takashi

Overdevelopment and crowding in Japan has forced many of its indigenous spirits and ghosts to lose their homes. Due to problems caused by the homeless spirits, a new profession was created, the Ghost Sweeper (GS). Private exorcists for hire; they serve only the highest bidder to survive in the cutthroat corporate world. Among this, the Mikami GS Company, led by Reiko Mikami and her two assistants, the teenage boy Tadao Yokoshima and the ghost girl Okinu, is said to be the best.

(Source: Wikipedia)

Included one-shot:
Volume 1: Gokuraku Mouja (Ghost Sweeping in the Haunted Mansion)

GS Mikami: Gokuraku Daisakusen!!

GS美神 極楽大作戦!!

Araki, Hirohiko

The creator of Baoh and JoJo no Kimyou na Bouken presents a manga about magic and mysteries! You'll meet him at 13:13 pm, on Friday the 13th. He'll do an uncanny intro where he plays a trick on you! And wherever he goes, trouble seems to always follow. Who is this person who creates such incidents? None other than Cool Shock BT!

(Source: Project Bite Me! Scanlations)

Mashounen B.T.

Cool Shock B.T.

魔少年ビーティー

Kuroiwa, Yoshihiro

Iizuka, Yukihiro

Raimon Ryuuta and Kuuko are sibling. Their parent is a treasure hunter, so since they were little they lives in a shrine with their parent's best friend who is an old man.  

Ryuuta and Kuuko are interested in anything strange, curious issues. Together they set up their business as a Fushigi Hunter, to solve cases of strange paranormal activity people asking them for help.

Fushigi Hunter

不思議ハンター

Uno, Hiroshi

At the end of 19th Century, Captain Drake, the pirate who traveled all over the world died. Rumor has it that he hide his treasure that is worth thousand millions pounds away from people. The map to this treasure is being torn into 2 parts. One part of it is owned by the military, lead by Colonel Visconti. The another part is owned by Drake's son. 

That young boy's name is Captain Kid, and with his Black Lightening sword and Kid's cunning crews the journey to find Captain Drake's hidden treasure begins.

Captain Kid

キャプテンキッド

Katou, Yuuta

Tensai Futsugakusha Lalo Purple no Hatsukoi

天才祓学者ラロ・パープルの初恋

Otomo, Katsuhiro

Kon, Satoshi

Collection of four stories by Satoshi Kon:

-World Apartment Horror
Manga adaptation of Otomo's self-directed live-action film of the same name.
A bumbling Yakuza member is sent to rid an old and rotten apartment block of its foreign occupants, but finds it a lot harder than expected when he discovers an evil spirit still resides there.

-Visitors

-Waira

-Joyful Bell

World Apartment Horror

ワールドアパートメントホラー

Nagai, Go

A collection of stories released to celebrate the 50th anniversary of Go Nagai's career.

Gensen Tanpenshuu: Gougasha

幻選短編集 豪画沙 GOGASHA

Tezuka, Osamu

Collection of various short stories. 

(Source: M-U)

Tiger Books

タイガーブックス

A different version of the Growlanser V story.

Growlanser V Generations Characters Comic Anthology

グローランサー5Generationsキャラクターズコミック

Tsujii, Motoko

A sequel to Sora no Soko Shirasuna no Himegimi.

Yami no Tenkuu is about Rika, Yoshino and friends. Yoshino has special power that whoever get close to her will be able to see spirits, demons and gain paranormal abilities. Even though Yoshino have this special power, she can't see or sense anything paranormal at all.

In this sequel, everyone in the manga is preparing themselves for their university exams. Yoshino's friends start losing power to see the spirits. Rika as being someone with a strong six sense, still can see spirit as usual. One day she notices that her paranormal abilities is still going on, Rika and Yoshino meet a mysterious new student named Kawamura.

Another huge case where Rika and Yoshino have to get themselves out of trouble.

12 Manga Like Soul Eater NOT!