This article is about a/an event in Kamen Rider Zero-One.
Daybreak Town Accident

The explosion

The Daybreak Town Accident (デイブレイクタウン事故 Deibureikutaun Jiko) was an incident that involved a massive explosion that occurred at a Humagear operation test city in 2007, 12 years before Aruto Hiden inherited Hiden Intelligence.

Despite incredible collateral damage and extensive casualties, culminating in the decimation of the entire town, the entire incident had been strictly regarded as an accident. Isamu Fuwa, a captain of A.I.M.S. and a survivor of the incident himself, instead sees it as a siege by rogue Humagears. Is AI The Enemy? The Ally?


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The Satellite being prepped for launch

The city was part of a developmental project where the Japanese government planned on creating Daybreak Town for the purpose of implementing Humagears into everyday technology. They consulted several technology companies such as Hiden Intelligence and ZAIA Enterprise to create the Ark, a special satellite made specifically for the Humagears in Daybreak Town.

Daybreak Humagear Attack

Humagears attack in Daybreak office.

As part of their crusade against humanity, the terrorist organization invaded the area where the Humagears were being produced and corrupted them, letting them run rampant. The Humagears then proceed to hunt any human inside Daybreak town, with Isamu Fuwa as one of the survivors. Is AI The Enemy? The Ally?

Eventually, they reached the nuclear reactors and caused them to go unstable, resulting in an imminent explosion. The head-factory man, Satoshi Sakurai had finished evacuating all the human workers out of the facility and locked it down to prevent the Humagears from leaving, and also minimalizing the casuality. In the end, the explosion had destroyed the entirely of Daybreak Town and killed Sakurai. I Saw The Bus Guide! Anna's Truth

Soreo D2

The young Aruto Hiden mourning his father's shutdown

While the majority of the Humagears present that day went berserk, there were some, such as Aruto's parental Humagear Soreo Hiden, that did not experience such malfunction. Consequently, Soreo was destroyed protecting his son from an explosion. I am the President and a Kamen Rider

In this incident, a number of Progrisekeys were lost, which are later thought to have reappeared in the hands of Hiden Intelligence. That Man, Sushi Chef


Daybreak Town Barrier

The barrier

The town was completely destroyed, with the ruins of buildings became half-submerged and the whole town became walled even after 12 years.

The destroyed town became the base of operation for, who is using data obtained from defeated rogue Humagears to restore an object called the Ark, which is currently submerged in the town.

The incident was later covered up by Hiden Intelligence, citing faulty maintenance to be the cause of the incident, with no information able to found on the incident in the Hiden Intelligence Database, and any employee, such as Jun Fukuzoe, kept the truth of the incident hidden from public knowledge, feigning ignorance about what happened.

Twelve years after the incident, a press conference was held that revealed new revelations regarding the incident, showing's involvement.

History Alteration

The creation of Another Zero-One by the Time Jacker Finis caused these events to be erased from history resulting in the premature death of Korenosuke Hiden and a Humagear takeover of Hiden Intelligence. This ended up leading humanity to the verge of extinction with Izu being the only known Humagear on humanity's side. Kamen Rider: Reiwa The First Generation

Known Individuals Involved

Known Survivors
Known Victims
Known Perpetrator


Icon-zero-one Kamen Rider Zero-One
Kamen Riders
Aruto Hiden - Isamu Fuwa - Yua Yaiba - Jin - Horobi - Raiden - Gai Amatsu
Movie-exclusive: Soreo Hiden
Hiden Zero-One Driver - A.I.M.S. Shotriser - MetsubouJinrai Forceriser - Zetsumeriser - Zaia Thousandriver - Cycloneriser - Raidriser - Zaia Slashriser - Progrisekeys - Progrise Holder - Progrisekey Connector - Hiden Risephone - Attache Calibur - Attache Shotgun - Attache Arrow - Breaking Mammoth - Giger - Authorise Buster - Assault Grip - Thousand Jacker - Progrise Hopper Blade
Hiden Intelligence: Korenosuke Hiden - Soreo Hiden - Jun Fukuzoe - Sanzo Yamashita
HumaGears: Izu - Shester - Soreo Hiden - Wazu Nazotoku - Subaru - Bot Hakase - Fukkinhoukai Jiro
A.I.M.S.: Isamu Fuwa
Zaia Enterprise: Gai Amatsu - Yua Yaiba
Legend Riders: Sougo Tokiwa - Geiz Myokoin - Woz - Tsukuyomi
Humans: Norio Uozumi - Go Sakurai - Satoshi Sakurai - Choichiro Ishizumi - Seiji Tazawa - Satō - Yuta Yomura - Isao - Shinya Owada
HumaGears: MaGe Ana - Nigiro Ikkan - Anna - Mashirochan - Dr. Omigoto - Z #5
A.I.s: Zea - Zat
Ark - Horobi - Naki - Jin - Raiden - Little Assassin
Footsoldiers: Trilobite Magia - Dodo Magia Chick
Monsters: Berotha Magia - Kuehne Magia - Ekal Magia - Neohi Magia - Onycho Magia - Vicarya Magia - Gaeru Magia - Mammoth Magia - Dodo Magia - Arsino Magia
Other Villains:
Finis - Will
Monsters: Crushing Buffalo Raider - Splashing Whale Raider - Dynamaiting Lion Raider - Storming Penguin Raider - Scouting Panda Raider - Fighting Jackal Raider
Footsoldiers: Battle Raiders
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