Kagarigari

"There is a human-hunting case which has thrown a town into confusion. The culprit is a vampire...A boy wielding a sword appears in front of the violent vampire?!" - official synopsis (translated)

Kagarigari is one of the 70th Shonen Jump Newcomer Treasure Award-winning​ entries and is the prototype to Kimetsu no Yaiba.

(Souce: Anilist)

Supernatural might refer to something mythical, mystical, bizarre, or something outside the bounds of accepted reality. There's a shadow of mystery often found in shows involved with this genre. Supernaturally oriented titles are often steeped in folklore, myth, or urban Legend. They may involve strange or inexplicable phenomena, Psychic Powers or emanations, and/or ghosts or other fantastic creatures.

Supernatural

In Western lore, demons are often described as minions from Hell, generally known to attack humans and feast on their flesh or possess the bodies of those with weak souls. In Eastern lore, on the other hand, they are generally supernatural, often but not always malevolent beings who can be more mischievous than actually evil, or simply supernatural spirits of no specific alignment.

Demon

The act or art of using a sword or similar weapon skillfully.

Swordplay

A vampire is a mythological or folkloric nocturnal undead. Vampires use long fangs to penetrate the necks of people, usually young females, to drink their blood, both as a form of nourishment and to turn the targets into slaves.

In the classic vampire stories, they are thought to have no reflection in mirrors, are able to shapeshift into bats (sometimes also wolves or some form of fog), have unlimited lifespan and superhuman strength, reflexes and senses, and may only be killed by silver bullets, silver blades, a stake through the heart, fire, or exposure to sunlight; on the other hand, they cannot tolerate garlic, holy water, or Christian crosses (sometimes expanded to religious symbols in general).

In modern anime, these limitations are usually dropped, and they become far more powerful and fearsome opponents than usual. A human bitten, or sometimes even scratched, by a vampire typically becomes a slave, eventually dying as if poisoned, and becoming a vampire, ghoul, zombie, or other form of undead after death, often staying under the command of the vampire who originally bit them.

Vampire

Various sports or skills, mainly of Japanese origin, that originated as forms of self-defense or attack, such as judo, karate, and kendo.