Uzumaki: Spiral into Horror - Recommendations

• OVA (1 ep)
• 1991

Thinking of committing fraud? Embezzlement? Murder? Think again. Though crimes often slip through the cracks of the laws of man, the laws of the spirit world are not as forgiving. In the underworld, even the dead can request vengeance against those who have wronged them, at the hands of the Judge, the keeper of justice. Hot on the trails of a corrupt executive, the Judge realizes that the chain-of-command might be guilty as well, causing an investigation of deadly proportions...

• OVA (1 ep)
• 1991

It is believed that to consume the flesh of a mermaid, means that you will never show signs of age, and live forever. However, many cannot handle its taste and become demons for eternity. Towa is a woman whose thirst for this flesh consumes her, as she was made only partially immortal by drinking the blood of a mermaid years ago. Unable to cast her demons aside, she destroys everything in her path on a search for this legend.

• Web

The second season of Dorohedoro.

• OVA (4 eps)
• 2013

One rainy night after a school festival, a group of students from Kisaragi Academy decide to perform the "Sachiko Ever After" charm, which will unite them forever as friends. Once the ritual is done, a sudden earthquake transports them to Heavenly Host, a torn down elementary school. Unbeknownst to Satoshi and his friends, however, is the horrific past behind it which culminated in its demolition. As they look for each other and try to escape from Heavenly Host, they soon find out their lives are at the mercy of those affected by that same bloodied past.

• TV (13 eps)
• 2015

Set in 1960s Kyushu, the show centers around Santa, a familiar from hell who is charged with maintaining the border between hell and the human world. Santa's mission has him crossing paths with many humans and supernatural creatures.

• TV (12 eps)
• 2022

Second season of Shadows House

• TV (12 eps)
• 2020

The city of Hole is a desolate town where magic users go to test their powers by disfiguring or killing its people. After being cursed by a sorceror, Kaiman was left with the body of a man and the head of a lizard. Determined to break the spell over him, Kaiman works with his companion, Nikaido, to search for the one who made him this way. Unfortunately, with no memory as to his assailant’s identity there’s only one way for him to locate them: he must bite the head of any magic user he meets so that the man hidden inside him can determine if they are the culprit. As he bites, slashes and kills his way through the cruel magic users, will Kaiman be able to find out who the man in his mouth is, where the one he hunts is hiding and return to normal, while keeping the revengeful magic users at bay?

• TV (13 eps)
• 2003

Legend says that if the flesh of a mermaid is consumed, the body becomes immortal. However, with the small chance of immortality comes a high chance of being poisoned, morphing and mutating into a monster beyond comprehension. Yuta is a wanderer: one of the few who has eaten the flesh and survived, and lived to tell about it -- for 500 years. By chance, Yuta meets a young woman named Mana who also shares the same fate, and together, they wander the land, searching for a mermaid who can free them from their immortal lives.

• OVA (3 eps)
• 1990 - 1991

Yuuko, a teenage girl, wishes for nicer clothes to impress the boy she likes. Kaori is faced with family problems while feeling lonely. Michiyo's crush transferred schools without ever noticing her, leading her to question her tomboyish looks. These girls seemingly have nothing in common, until all three come into possession of a beautiful one-piece dress. But is the dress just an innocent gift, or is there something more sinister at play?

• OVA (1 ep)
• 1993

Following in the footsteps of Mermaid Forest (another OVA by Rumiko Takahashi), Yuta and Mana are back, and have travelled to a new city for work and rest. By chance, they meet Masato: a young boy whose mother is known to have come back from the dead. The pair discover that Masato's household contains dark secrets, which may end up costing them their lives!