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Icon-buildThis article is about a term in Kamen Rider Build.

Hazard Level (ハザードレベル, Hazādo Reberu) is a term coined by Faust to measure a human's resistance to Nebula Gas. A low Hazard Level means that a certain individual would have a much lesser chance of withstanding the gas' effects and have greater chances of dying. Higher Hazard Levels would allow a certain individuals to perform feats that would normally require a prerequisite Hazard Level. Raising one's Hazard Level also seems to nullify psychological effects of the Pandora Box and Nebula Gas, such as Sento Kiryu being able to use the Hazard Trigger for longer periods of time without going berserk and Gentoku Himuro's paranoid and cruel personality traits gained during the Sky Wall Tragedy disappearing after being experimented on by Namba Heavy Industries.

Description[]

Individuals with Hazard Level 1 would die a short while after being administered with the gas, while individuals with Hazard Level 2 would immediately be converted into a Smash. Anyone with a Hazard Level above Level 2 would retain their human form even after being administered with the gas, with prime examples being Sento Kiryu and Ryuga Banjo. According to Gentoku and Takumi Katsuragi's data, anyone with a Hazard Level above Level 3 would be able to use the Transteam Gun or Build Driver, while those above Level 4 are able to use a Sclash Driver.[Night Rogue Chapter] However, while a Level 5 Hazard Level is required to use the Evol-Driver, it's assumed that no human is capable of naturally reaching that Level. [The Final Weapon: Evol]

Evidently, Faust's experiments were to isolate people with Hazard Levels high enough to use the Rider System so they could create an army of Kamen Riders for military purposes.

Theoretically, the Hazard Level of humans may be raised through two means: temporarily through strong emotions, and permanently through the continual usage of purified Fullbottles and the Rider Systems.

Classification[]

Hazard Level of Riders

Blood Stalk reading Hazard Levels

The first Hazard Level mentioned in the series was Kasumi Ogura's. Due to her unnamed illness, her physical state could not withstand the transformation of being turned into a Smash. Night Rogue labeled her as "Hazard Level 1", claiming that once anyone extracted her Smash Essence, she would die immediately. Ryuga bitterly allowed Sento to extract her Smash essence, thus killing her. Her Smash essence was later purified into the Dragon FullBottle, which Ryuga treasured greatly. [The Innocent Runaway]

Sento Kiryu/Kamen Rider Build is given Hazard Level 3.2 and later 3.7 by Blood Stalk, who notes that anger leads to his Hazard Level increasing. [Dangerous Identity]

While fighting Ryuga, Blood Stalk calls him Hazard Level 2.4, which grows incrementally to 2.7 throughout the fight. [Memory Starts To Talk] Later, due to Ryuga's determination and strong synchronization with the Dragon Fullbottle, his Hazard Level rose to 3.0 [Technology of Destruction], thus allowing him to become Kamen Rider Cross-Z. [Burning Dragon]

By fighting as Kamen Rider Cross-Z, Banjo was able to push his Hazard Level to 4.0, allowing him to use the Sclash Driver.

Ryuga's Hazard Level later reaches Hazard Level 5 due to his alien physiology, thus allowing Evolto to possess him and use the Evol-Driver.

Known Levels[]

Level Description
1 Subjects will die upon exposure, and ultimately when defeated as a Smash; normally caused by a pre-existing illness.
2 Subjects will transform into a Smash, but regain their humanity upon defeat, albeit with short-term memory loss. The most common Hazard Level.
2.1+ Subjects retain their human forms after being doused, seemingly suffering no side effects.
2.4 Ryuga Banjo at the start of his fight with Blood Stalk.
2.7 The peak of Ryuga's Level at the end of his fight with Blood Stalk.
3 The minimum Hazard Level required to use the Build Driver. Eventually reached by Ryuga.
3.2 Sento Kiryu during his first fight with Blood Stalk.
3.6 Kiba's Hazard Level in his Hard Smash form, as measured by Blood Stalk. [The Forbidden Item]
3.7 Sento's Level when angered. Also the Hazard Level of Akaba and Aoba in their Hard Smash forms. [The Forbidden Item]
3.9 Sento's Hazard Level when using Rabbit Tank Sparkling, as measured by Blood Stalk. [The Forbidden Item]
4 The minimum Hazard Level required to use the Sclash Driver. Ryuga's Hazard level when using the Sclash Driver [The Forbidden Item]
4.2 Kazumi Sawatari's latest Hazard Level, as measured by Blood Stalk. [The Forbidden Item]
Sento's Level before quickly increasing to 4.4. [A Man Called Rogue]
4.4 Sento Kiryu's Hazard Level while in Hazard Form, as measured by Blood Stalk. [A Man Called Rogue]
4+

Gentoku Himuro’s Hazard Level, as evidenced by his usage of the Sclash Driver.

5 The Hazard Level necessary to use the Evol-Driver. According to Shinobu Katsuragi's research, it is impossible for a normal human being to reach this level. The first person to reach this level was Soichi Isurugi/Evolto. Ryuga was eventually able to reach this level as Cross-Z Magma at the end of his fight with Evolt.
6 Sento's Hazard Level after using a Pandora Box panel in the Build Driver. [Evolto Hunts the Stars]
6.3+ Sento's Hazard Level after raising it by cranking the Build Driver's Vortex Lever with the Pandora Box panel inserted.
7+ Ryuga's Hazard Level after remembering the destruction of Mars when he was part of Evolto. This Hazard Level was soon reached by Sento as well. Achieving this Hazard Level has a physical effect on Fullbottles. According to Shinobu Katsuragi's research files, any two Fullbottles transformed due to this Hazard Level will be able to create a Best Match, regardless of whether they are biotic or abiotic. [Kamen Rider Build: Be The One]

This is also the Hazard Level necessary to use the Muscle Galaxy Fullbottle [Build NEW WORLD: Kamen Rider Cross-Z], as well as the Grease Fullbottle and Grease Perfect Kingdom [Build NEW WORLD: Kamen Rider Grease]

Notes[]

  • The terminology used in the show refers to the real-life biological hazard and biosafety level, which adheres to a specifc grade level given to access a person's adaptibility/compatibility to certain levels of hazardous material. In Build, the Hazard Level measures one's combat proficiency and affinity with the transformation items to acheieve certain levels that are initially deemed impossible for humans to achieve. [Another Build]
    • Past instances where power is more dependent on the individual person rather than the Rider system itself, includes the Armored Riders from Kamen Rider Gaim, with elements taken from other series like Kamen Rider Blade's Fusion Co-efficiency and Kamen Rider Wizard's Mana. In all of these cases including Build, over-exposure leads to incontrollable impulses and irreversible reactions, which often results in death and the overtaking of one's body with a supernatural manifestation or mutation.
  • The term 'Hazard Level' was previously been used in GoGo Sentai BoukengerIcon-crosswiki, which also measure a certain level of danger that a PreciousIcon-crosswiki could pose. Coincidentally in the same show, there is a Precious called the 'Pandora's BoxIcon-crosswiki', which had one of the highest Hazard Levels in the show.

External links[]

Navigation[]

Icon-build Kamen Rider Build
Kamen Riders
TV-Series: Sento Kiryu (Takumi Katsuragi) - Ryuga Banjo - Kazumi Sawatari - Gentoku Himuro - Evolto - Nariaki Utsumi - Shinobu Katsuragi
Movie-exclusive: Kengo Ino - Killbus - Keiji Uraga
Gear
Drivers/Transformation Gear
Build Driver - Transteam Gun - Nebulasteam Gun - Sclash Driver - Evol-Driver
Build Driver Adapters
(Great) Cross-Z Dragon - Hazard Trigger - Cross-Z Magma Knuckle - Evol-Trigger - Grease Blizzard Knuckle - Killbuspider - Grease Perfect Kingdom
Normal Weapons
Drill Crusher - Hawk Gatlinger - 4Koma Ninpoutou - Kaizoku Hassyar - Fullbottle Buster - Steam Blade - Beat Closer - Twin Breaker
Suit-Equipped Weapons
Muscle Glove - Solstall Wings - Giant Scratcher - Space Ride Arm - Spine Knuckle - Long Range Cleaner - Trash Converter - Gold Lio Gauntlet - Multi Deluge Gun
Collectible Devices
Fullbottles - Sclashjellies
Fullbottle-related Devices
Fullbottle Holder - Pandora Box - Build Phone - Halfbodies
Terminologies
Vortex Finish - Hazard Level - Project Build - Sky Wall - Nebula Gas
Other
Utan - Higetan
Allies
nascita: Misora Isurugi - Soichi Isurugi - Sawa Takigawa - Kazumi Sawatari - Gentoku Himuro
Legend Riders: Eiji Hino - Gentaro Kisaragi - Kouta Kazuraba - Takeru Tenkuji - Emu Hojo - Hiiro Kagami - Taiga Hanaya - Kiriya Kujo - Kuroto Dan - Parado - Poppy Pipopapo - Sougo Tokiwa - Geiz Myokoin - Tsukuyomi - Is - Reika Shindai - Sakura Igarashi - Hana Natsuki
Prime Ministers: Taizan Himuro (Touto) - Yoshiko Tajimi (Hokuto) - Masakuni Mido (Seito)
Namba Heavy Industries Ltd.: Juzaburo Namba - Nariaki Utsumi - Haruhiko Wanibuchi - Guardian
Hell Bro's: Fu Washio - Rai Washio - Yoshikazu Takahashi - Norio Matsui
Aliens: Vernage
Girls Remix: Akiko Narumi - Kanon Fukami - Rinko Daimon - Lovekov
Faust
Gentoku Himuro - Evolto - Nariaki Utsumi - Takumi Katsuragi - Shingo Kuwata - Eita Kawai - Yoshikazu Takahashi - Norio Matsui
Smash
Normal Smash: Fang Smash - Needle Smash - Strong Smash - Burn Smash - Flying Smash - Mirage Smash - Square Smash - Press Smash - Ice Smash - Stretch Smash
Empowered Smash: Strong Smash Hazard - Press Smash Hazard - Stretch Smash Hazard - Flying Smash Hazard
Hard/Hazard Smash: Castle Hard/Hazard Smash - Stag Hard/Hazard Smash - Owl Hard/Hazard Smash
Clone Smash: Press Clone Smash - Stretch Clone Smash - Strong Clone Smash - Flying Clone Smash
Lost Smash: Owl Lost Smash - Stag Lost Smash - Castle Lost Smash - CD Lost Smash - Scissors Lost Smash - Zebra Lost Smash
Foundation X
Kaisers: Kaisei Mogami (World of Build, World of Ex-Aid) - Nebula Bugster
Blood Tribe
Kengo Ino - Ryoka Saiga - Mitsuomi Gobara - Evolto - Killbus - Akaba (imitation) - Aoba (imitation) - Kiba (imitation) - Remocon Bro's (imitation) - Engine Bro's (imitation)
Down Fall
Keiji Uraga - Simon Marcus (Phantom Crusher)
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