Series to check out if you like YYH that aren’t HxH, DBZ or Bleach
Level E - This series ran between the end of Yu Yu Hakusho and the start of Hunter x Hunter. Level E deals with various extraterrestrial conflicts and a sadistic alien prince dubbed lovingly as “Prince Baka.” Togashi is up to all his old tricks including some new ones that shouldn’t be missed if you love his sense of humor.
Ookami Nante Kowakunai - A collection of various short stories by Togashi before his big break. It ranges from RPG silliness to a story that might vaguely explain behind the concept of Yu Yu Hakusho with a small detective crew.
Ten de Shouwaru Cupid - One of Togashi’s first serial stories. It focuses on a boy who is constantly being followed by a beautiful demon who hopes to seduce him despite his determination to remain “pure.” Lots of silly antics and cute girls.
Ooboonuu and Chiiboonuu (in collaboration with Naoko Takeuchi) - also known as “Big Boonuu and Little Boonuu.” This is a story Togashi and his wife, the creator of Sailor Moon, made for their children. It’s about two Boonuus, magical creatures that live in a forest, and their everyday life as they try to stay out of trouble. They look vaguely like, uh, penises??? You’ll see.
Rokudenashi Blues by Masanori Morita - A story at heart about delinquents and their lives as they go through high school. The manga is still being scanalated but if you love punks with hearts of gold, this is a winner.
Hell Teacher Nube by Sho Makura and Takeshi Okano - This series follows a similar format as Yu Yu Hakusho with demons and the supernatural but instead involves a goofy teacher and his students at an elementary school. Tons of Japanese folklore along with various jokes are explained in this series. There’s also a fox demon character who becomes pretty prominent later on in the series.
Cromartie High School by Eiji Nonaka - A comedy series based on a high school full of the toughest delinquents around and the various antics they manage to get into on a daily basis. It parodies typical tropes of delinquent manga any chance it gets, and it’s totally hilarious.
Kyou Kara Ore Wa! by Hiroyuki Nishimori - Another comedy based series around two students who suddenly decided one day to become delinquents in order to make their lives more exciting. Mitsuhashi, the main character, is the most dastardly delinquent in the series and his best friend, Itou, is usually always trying to keep him out of trouble. One of my all-time favorites.
Series with references in YYH:
Ushio and Tora by Kazuhiro Fujita - Yanagisawa references Ushio and Tora when Yusuke emerges from Demon’s Door Cave in the manga saying Yusuke’s demon form resembles Ushio’s appearance when he’s possessed by the beast spear, a weapon that gives Ushio the power to defeat various demons in the series. Ushio and Tora follows a similar plot to Yu Yu Hakusho’s with demon slaying and whatnot, but it is far from the same (in a good way).
Ashita no Joe by Asao Takamori and Tetsuya Chiba - Kuwabara references this series during the Yusuke VS Sensui battle when he calls out to Yusuke to get up, similar to how Joe’s coach, Danpei, tells Joe to stand up after being knocked down during a boxing match. This series is a total classic. Everyone should read it.
Patalliro! by Mineo Maya - A series that Togashi actually draws a lot of inspiration from specifically. Togashi explained that Hiei was inspired by a character in this series (named Skunky funny enough) and many of Koenma’s antics mirror Patalliro’s misadventures as a boy king of an entire nation.
JoJo’s Bizarre Adventure (mostly Parts 3 and 4) by Hirohiko Araki - The territory powers introduced in Chapter Black, according to Togashi, were a parody of stands, and many of the battles following their introduction are similar to some fights in Part 3. With Part 4, some fans have speculated that Araki might have been inspired by Yusuke and Kuwabara’s friendship while creating Josuke, the main character, and his best friend, Okuyasu.