The items featured in this list do not have enough information to justify an article, mainly due to lack of relevance, but are still notable. (Note: Blue buttons link to separate pages)
Tanks used to contain Baoh-affected organisms. The tanks are filled with water so that the organism can enter a state of suspended animation, being comatose.
A box of matches that 22nd Man uses to try and burn Ikuro's body. However, just as 22nd Man lights a match, Ikuro grabs his hand and melts it, causing it to drop to the floor and cause a huge gas explosion.
The scientists and some assassins of Dress Organization possess syringes filled with poison, usually to neutralize any escaped experiments. One is used on Ikuro's parents to kill them and use their son for Dress's experiments. Later, Dordo tries injecting Baoh with poison, but the syringe is shot at by Rokusuke.
A hunting rifle that Rokusuke keeps and uses for self-defense. Later, after being hypnotized and told to do so by Dordo, Rokusuke tries to assassinate Baoh, Sumire, his wife, and eventually himself with the rifle, but is stopped by Baoh.
A sniper rifle that Dordo keeps in a suitcase. Its scope is designed to connect to his mechanical eye via a tube. Its bullets has tiny but destructive explosives on their tips for devastating damage. Dordo uses it for assassinations, and later tries to use it to assassinate Baoh.
A pair of headphones that Walken wears at all times in order to suppress his psychic power. However, during his fight with Walken, Baoh destroys the device when he shoots one of his sabers at Walken's head, and Walken later wakes up berserk.
Large speakers that emit loud sound as a form of torture. They are used on Sumire so that Baoh can detect her pain and be lured into the Dress laboratory. The stereos are eventually destroyed by Baoh.
A symbol originating from the fictional Native American Skookum Tribe that consists of two X shapes. It is a mark that symbolizes respect towards a warrior through death. Upon meeting Baoh, Walken carves this symbol on his chest, something that he's never done before, and shows it to Baoh, indicating he respects Baoh as a true warrior.
Laser cannons that were developed by the Dress Organization. Sumire's interrogation chamber is booby-trapped with laser cannons, which are powered down and only fire at Baoh when he enters the room. Later, during his final confrontation against Walken and Dr. Kasuminome, Baoh grabs a laser cannon and uses the Baoh Break Dark Thunder Phenomenon to charge the cannon and fire at Walken, slicing him in half. The laser also cuts off some stalactites, letting them fall down on Dr. Kasuminome (and Sophine in the OVA).
In All-Star Battle, Baoh uses a laser cannon as his HHA, a nod towards his last battle against Walken.
Some flowers that a boy decides to give to Irene. The boy tells Irene that the flowers are edible, while his friends are hiding and betting to each other on whether or not she'd eat the flowers. To the boys' surprises, Irene does eat them.
A chewing gum that Lauper has in her mouth that can extend itself and instantly harden like metal. Lauper mentions that she had to do proper training so that she can make the gum extend into a sword-like weapon.
After Lauper kills a defensive tailor, she has his head put into a package and delivered to a newspaper worker. Along with the package is a note that says this package is to give the worker a warning not to spread news across the media about her.
A huge chainsaw that serves as Lauper's weapon of choice. It has a 400cc engine and weighs 80 kg (180 lb). When she tries using it on Irene, however, Irene simply holds it up with little effort. Later, Irene manipulates Lauper into cutting herself in half with the chainsaw.
A mirror that Irene brings to Lauper after immobilizing her with hypnosis. Irene draws a single line down Lauper's reflection on the mirror, commanding her to cut herself in half with her chainsaw.
A fire-shaped tattoo with a hand shape in the middle on the female assassin's back. It is capable of summoning spectral objects, including an extra arm and fire ants. The hand in the tattoo is noted to move whenever the assassin commands it to summon something.
A purse that Irene uses to store her makeup tools. Later, Michael tries to steal it, but is disappointed when he finds out it contains only makeup and not money.
A photo of Irene. The female assassin uses this photo to figure out what Irene looks like so that she can hunt her down. She shows this photo to a bartender, who says he's met Irene before and is able to tell where Irene went.
A bottle of perfume that Jotaro Kujo bought from a merchant in exchange for learning about Joseph's whereabouts. Later, after the defeat of Ammit, when The Scribe Ani tried to summon another creature using The Genesis of Universe, Jotaro threw the bottle at him, blinding Ani and allowing himself to get close enough for Star Platinum to attack.
A postcard that Akari Hirai finds in an alleyway. It has a picture of a field that stretches all the way to the horizon printed on it. On the grass are two black horses huddled together. Akari sees the two horses on the field as mother and child. It is one of the two things Akari Hirai could leave to her son Takuma Hasumi after she is imprisoned in an alley and is forced to let Teruhiko Futaba take her son away to an orphanage. Takuma later sticks the postcard to a wall in his house and plans to take it with him when he leaves Morioh.
A necklace that Teruhiko Futaba bought for his girlfriend Akari Hirai at an antique shop. It is made of a round jewel that looks like a scarab attached to a silver chain. The jewel is a shiny black stone which, according to Futaba, is made of a fossilized tree. It is lightweight, can be electrically charged through friction, and apparently long ago people believed that it contained magic. It is one of the two things Akari Hirai could leave to her son Takuma Hasumi after she was imprisoned in an alley and was forced to let Futaba take her son away to an orphanage. Takuma then gives it to Chiho Futaba. Teruhiko recognizes the necklace later. After the events of the story, Chiho still keeps it.
A photo of Team Bucciarati (sans Giorno), which was taken in Naples just before they set off to Capri to retrieve Polpo's treasure. Giorno Giovanna gives it to Pannacotta Fugo at the end of Purple Haze Feedback.
A space probe launched in 1985 to study Halley's Comet. Thirty-six incarnations of it along with The Eyed Balloon were used by Kars to build a spaceship, which he used to get back to Earth.
In June of 1997, a metal plate from the spacecraft fell to earth and landed on the house of Enrico Pucci (Universe 37), killing his family. The metal plate had fourteen phrases in Italian and English scratched onto it along with an excerpt of how to reach heaven.
